231results about How to "Increase security risks" patented technology

The invention relates to the field of polypeptides, in particular to a method for preparing semaglutide. The method has the advantages that Fmoc-Lys (Alloc)-OH protection amino acid is used as a raw material, de-protection is carried out by the aid of selected Pd (PPh3) 4, accordingly, operation procedures are simple, only 1-2 times of simple elimination reaction operation are required, each elimination reaction operation is carried out for 10-30 min, side reaction is prevented, the operation procedures are safe, and enlarged production can be facilitated; Boc-His (Boc)-OH. DCHA and Boc-His (Trt)-OH are used as raw materials in the procedures, and accordingly His racemization risks can be reduced to the greatest extent; special fragments are coupled, and accordingly the synthesis efficiency can be improved.

The invention discloses an automatic refueling and expense settlement completing system for an automobile. The system integrates technologies and applications, such as computer software / hardware, an RFID (Radio Frequency Identification) technology, wireless communication, information acquisition, data transmission, network communication, automatic control, network payment and a ranging and positioning system. According to the system, an on-board computer is used for acquiring the volume of a fuel carried by the automobile and transferring data to a database through the Internet of vehicles, so that automobile carried volume can be examined through a mobile terminal; if the fuel is required to be added, ordering and the prepaying of corresponding expense can be completed through the mobile terminal, then, a corresponding user is navigated to a gas station, an automatic refueling system acquires information on a vehicle electronic tag through the RFID technology so as to realize automobile identity identification, then, refueling and information acquisition are completed automatically, and refueled settlement is completed. The system has the advantages that the whole process is carried out automatically, the safety, service level and efficiency of a refueling process are increased, the charge management is simplified, the environmental pollution is lowered, labor is saved, and the like.

The invention discloses a charging device for an environmentally-friendly new energy electric car. The charging device comprises a charging box body fixed to a wall body, a containing cavity is formed in the charging box body, and first sliding grooves are formed in the upper side and the lower side of the containing cavity correspondingly. A screw is arranged in each first sliding groove, the left side end of the screw of each screw is in power connection with a motor, and a first sinking groove is formed in the inner wall of the right side of the containing cavity. First conductive pillars are arranged on the inner wall of the left side of the containing cavity, and the containing cavity is internally provided with a movable sliding block, wherein the upper side and the lower side of the movable sliding block extend into the first sliding grooves of the upper side and the lower side of the containing cavity correspondingly, and the movable sliding block is connected with the first sliding grooves in a sliding fit mode. The movable sliding block in the first sliding grooves is in threaded and matched connection with the screws, first power supply holes opposite to the first conductive pillars are formed in the end face of the left side of the movable sliding block, and an elastic power supply wire is arranged between the end face of the right side of the movable sliding block and the first sinking groove. An inserting groove is formed in the wall body of the left side of the charging box body, and second conductive pillars are arranged on the inner wall of the right side of the inserting groove. The charging device for the environmentally-friendly new energy electric car is simple in structure, convenient to operate and high in safety and connecting fastening property.

A music embedding attack defense method for a voice recognition system comprises the following steps: (1) preparing a data set and preprocessing; (2) training a voice recognition model; (3) pre-training a generative adversarial network; (4) retraining the generative adversarial network; (5) generating an adversarial sample; and (6) performing adversarial training. According to the invention, musicaudios are generated through the generative adversarial network; a transcription result of the adversarial audio is obtained by using the voice recognition model, and a target function is set by using the loss between the transcription result and the target phrase and the discrimination result of a discriminator to optimize a generator, so that the generated adversarial audio cannot be recognizedby human ears and is transcribed into the target phrase; and the capability of the speech recognition system in defending against sample attack is improved through adversarial training.

The invention relates to the technical field of big data technologies and cryptology, in particular to a data hiding query security sharing system and method based on multi-party security computing. The invention provides a data hiding query security sharing system and method based on multi-party security computing. The system comprises a DH key interaction module, a user key information hiding interaction module, a user core data hiding interaction module and a user core data security sharing module. A new thought is provided for breaking a current inter-institution data barrier, a new schemeis provided for inter-institution data safety sharing, it is ensured that user identity information cannot be decrypted by other third parties through a key dynamic dual encryption technology and a secret sharing algorithm, and information safety sharing that institution core data cannot be delivered out of a database is achieved. Not only is safety of user information ensured, but also safety ofdata assets of a financial institution is ensured.

The invention provides a rain-proof distribution box, and belongs to the technical field of power distribution equipment. The rain-proof distribution box comprises a square box body and a plugboard, wherein static contacts and slide chutes of a plurality of electric connectors are fixed in the box body; movable contacts of the electric connectors are arranged on the plugboard; guide sliding strips coats two sides of the plugboard; the slide chutes are matched with the guide sliding strips and are fixed on the inner side wall of the box body; the plugboard comprises an upper plugboard, a middle plugboard and a lower plugboard; two portable handles are fixed on the upper end surface of each plugboard; a hand push handle is arranged at the outer end of each plugboard; a ventilating partition plate is also horizontally arranged in the box body and is located below the lower plugboard; a plurality of air holes are formed in the middle of the ventilating partition plate; a lifting rod is vertically arranged at the center of the ventilating partition plate in a penetrating manner; the upper end of the lifting rod is connected with a support block; the lower end of the lifting rod is connected with a floating plate; and the lifting rod ascends and then the air holes are completely plugged by the floating plate. According to the rain-proof distribution box, the distribution box and the outside are kept in good ventilation; and the rain-proof distribution box has good waterproofness and high safety.

The invention provides an abnormal access behavior detection method. The method comprises the steps of recording an access relationship set of access behaviors of a terminal; inputting the access behavior characteristics of the access relationship set into an access detection model,wherein the access detection model is a model obtained by training access behavior characteristics in historical access data of the terminal; and determining whether the access behavior in the access relationship set is an abnormal access behavior or not according to an output result of the access detection model. The potential safety hazard of the terminal can be greatly improved, and the safety performance of the terminal is improved. The invention further provides an abnormal access behavior detection system,a computer readable storage medium and a terminal, which have the above beneficial effects.

The invention provides a basement bottom plate water leakage repairing system. According to the steps, knockout is conducted from a basement bottom plate cushion layer to a structure layer; a machining groove is chiseled in a repairing part; a slip casting needle head is embedded in the machining groove for grouting; brush application of a base layer adhesion agent is conducted; structure reinforcing and floating are conducted through repairing mortar; brush application of an acrylic acid waterproof coating is conducted; polyester cloth soaked in the acrylic acid waterproof coating is laid andpasted; brush application of the acrylic acid waterproof coating is conducted; integral brush application of the base layer adhesion agent is conducted; integral brush application of a high-elasticity cement-based waterproof coating is conducted; integral brush application of a polyurethane waterproof coating is conducted; integral pavement and pasting of a modified asphalt waterproof roll are conducted; impervious mortar is used for integral leveling protection; box iron is adopted to manufacture a drainage channel; water drainage plates are laid to the position of a drainage ditch; concretepouring is conducted; and surface construction layer recovery is conducted. Multiple materials and multiple technologies are adopted to be combined as a whole, and the system solves the problem aboutbasement water leakage.

The invention relates to the technical field of plate processing, in particular to a plate thickness adjusting device capable of automatically feeding materials. The plate thickness adjusting device capable of automatically feeding materials comprises a support frame, wherein the bottom end of the support frame is fixedly connected with a base, an adjusting mechanism is fixedly installed at the center of the top end of the support frame, the adjusting mechanism comprises a second support column, a groove is formed in the second support column, a second roller is inserted into the groove, and athird belt pulley is fixedly connected to the back surface of the second roller. According to the plate thickness adjusting device capable of automatically feeding materials, the adjusting mechanismis arranged, a second knob is rotated during use, the second knob drives a rotating shaft to rotate during rotation, and the rotating shaft rotates on the inner wall of a sliding rod, so that the sliding rod moves on the surface of the rotating shaft, and the position of the second roller is changed. When the distance between the second roller and the first roller is kept at a proper distance, a plate with the proper thickness is pushed through the rotation of a second pushing block, the need for manual pushing is avoided, and the working efficiency is then improved.

The invention belongs to the field of membrane materials and discloses a PDMS / PEI (Polydimethylsiloxane / Polyetherimide) separating membrane and a preparation method of the separating membrane as well as the application of the separating membrane. The preparation method comprises the following steps of: preparing high polymer emulsion of organic silicon by adopting an emulsion polymerization method, further crosslinking into silicone rubber under the effects of a catalytic agent and a cross-linking agent, and forming the PDMS / PEI composite membrane on a basement membrane through high temperature curing. The siloxane prepared by the preparation method has high molecular weight; the prepared membrane has smooth and compact surfaces without defects and is tightly combined with PEI. The membrane prepared by the method is pollution-free and non-toxic. The prepared separating membrane is used for separating and recovering organic gases, thereby higher selectivity is obtained.

The invention belongs to the technical field of organic compound preparation, and discloses ioversol and a synthesis method thereof. The chemical name of ioversol is N,N'-bis(2,3-dihydroxypropyl)-5-[N-(2-hydroxyethyl)-hydroxyacetamido]-2,4,6-triiodo-1,3-benzenedicarboxamide. 5-hydroxyacetylamino-N,N'-bis-(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide and an alkylation agent carry outalkylation reactions under an alkaline condition to generate ioversol. Bromoethanol and sodium hydroxide are taken as reagents; glycol and anhydrous ethanol are taken as a mixed solvent, in the absence of water, a substrate can be well dissolved; the hydrolysis of the alkylation agent is avoided, the raw material loss is largely reduced, the utilization rate is increased, the reaction yield is increased, and the cost is reduced. At the same time, dangerous and toxic reagents such as chloroethanol, ethylene oxide, and the like are not used, the safety hazard is reduced, the damage to human body is reduced, and the stability of industrial production is guaranteed.

The invention discloses an insulator recognition and fault diagnosis method based on an infrared image. The method comprises the following steps of A, performing photographing on an insulator and performing image recognition for differentiating different insulators; and B, analyzing temperature characteristics of the different insulators in displaying in the image, and determining the insulator with the abnormal temperature characteristic as a faulted insulator. The insulator recognition and fault diagnosis method can settle defects in prior art and furthermore has advantages of high suitability of automatic checking in a complicated environment and low error determining rate.

The invention provides an installation software authentication method through a management and control APP. Whether installation of software is allowed is judged through a software installation package name, and installation is performed under the condition that installation is allowed, which is different from the current software authentication method through a blacklist and a whitelist. The current method is that software is installed firstly and then matching of the blacklist and whitelist is performed, and software uninstalling is performed if installation is not allowed. The installation-matching-uninstalling software authentication method has high security hidden trouble. In order to prevent installation of adverse APP on a management and control mobile phone to uninstall or decode the management and control APP, malicious software can be ensured not to be installed on the mobile phone through software authentication so that safe use of the mobile phone can be ensured and the method has higher security.

The invention discloses a method for high-efficiency preparation of a Maillard reaction intermediate by a low-temperature synthesis-decompression co-boiling dewatering coupling technology. The method comprises the following steps of: after heating an aqueous solution of amino acid and reducing sugar for a period of time, rapidly reducing air pressure to be below 40mbar for dewatering under the same temperature, and when no fraction flows out, restoring the system to normal temperature and normal pressure; adding food-grade alcohol into obtained dry materials, fully mixing, then carrying out decompressed evaporation and obtaining a solid Maillard reaction intermediate product. Compared with the traditional method for preparing the intermediate by heating and returning of methanol, the method disclosed by the invention has the advantages that the production cost is greatly reduced, the green-scientific-sustainable industrial design concept is met, the obtained Maillard reaction intermediate is higher in conversion rate, has stronger eating safety, and can be directly applied to foods as a food additive. Compared with the water-phase variable-temperature Maillard reaction technology, the method disclosed by the invention has the advantages that the intermediate conversion rate is increased by 370.0%, the innovation is stronger and the progressiveness is obvious.

The invention discloses a fog computing industrial protocol construction method based on a generative adversarial network. Different from a traditional defense method, a fog computing industrial control system model is adopted, a simulation protocol capable of being deployed to a honeypot system is constructed by utilizing a deep convolutional generative adversarial network, and then active defense and passive defense based on the honeypot technology are combined to protect the industrial system. The honeypot deployed outside the system not only can be used for knowing malicious behavior capture vulnerabilities of attackers, but also can be used for preventing and defending hackers' attacks to a certain extent, so that an active defense technology similar to the honeypot is necessary for afog computing industrial system with relatively low security. Deployment of an actual industrial protocol in a honey pot consumes time and labor, protocol information is exposed, potential safety hazards are caused, and the purpose of deception attackers cannot be well achieved by directly simulating a low-interaction static protocol flow rather than practically. Therefore, it is particularly important to construct a realistic simulation protocol to cheat an attacker.

The invention discloses an intelligent single-body hydraulic prop, which belongs to the technical field of support equipment. A man-machine interaction unit (2) and a main control module (3) are arranged on a prop main body (1); the main control module (3) controls the man-machine interaction unit (2); the main control module (3) monitors signals of a pressure sensor through an analog-to-digital module; and the main control module (3) controls a display circuit, a warning circuit and a wake-up circuit. The intelligent single-body hydraulic prop has the advantages that the pressure condition of the single-body hydraulic prop can be effectively monitored, potential safety hazards can be discovered in advance, and the safety performance is enhanced; and meanwhile, the man-machine interaction function of the single-body hydraulic prop is realized, so the use of the single-body hydraulic prop is more intelligent and humanized.

A highly-sealed automobile end-outline marker lamp comprises a lampshade (1) and a lamp shell (2).The lampshade (1) and the lamp shell (2) are sealed and connected into a cavity through the welding technology.The lamp shell (2) is provided with a reflection bowl (3) provided with a bulb installation hole (4).The bulb installation hole (4) is provided with a light source assembly (5).The end-outline marker lamp is characterized in that an air outlet (6) is formed in the back side of the lamp shell (2), an air-permeable film (7) is attached to the air outlet (6), and an aluminum-plated layer is arranged on the inner surface of the lamp shell (2).According to the end-outline marker lamp, the light utilization rate is increased through the aluminum-plated layer on the inner surface of the end-outline marker lamp and the reflection bowl, the brightness of the automobile end-outline marker lamp is improved, and accordingly safety hidden hazards caused by an automobile lamp are reduced.Meanwhile, it can be guaranteed that the service life of the automobile lamp is long.

The present invention is a method for controlling APP authentication of installed software. First, judge whether the software is allowed to be installed through the name of the software installation package, and only execute the installation action when the installation is allowed. The method of software authentication, the current method is to install the software first, and then perform black and white list matching. If the installation is not allowed, then uninstall the software. This method of software authentication of installation, matching, and uninstallation has high security Hidden danger, in order to prevent bad APP from being installed on the control mobile phone, uninstall or crack the control APP, the invention ensures that malicious software will not be installed on the mobile phone through software authentication, ensuring the safe use of the mobile phone, and has higher security.

The invention provides a six-dimensional force sensor based on image feedback, a six-dimensional force sensing clamping probe based on image feedback, and a six-dimensional force sensing clamping apparatus based on image feedback. The six-dimensional force sensor comprises a contact end, an elastic deformation body, a marking block, a base, an image information identification module and a contactforce modeling module, wherein when the contact end is subjected to acting force, the elastic deformation body deforms; the marking block comprises N feature points, when the elastic deformation bodydeforms so as to enable the contact end to deviate and / or deflect, the marking block moves and / or rotates following the contact end, and N is greater than or equal to 4; the base attaches to the elastic deformation body for supporting the elastic deformation body; the image information identification module is used for capturing the image information of the marking block in real time and processing the image information; the contact force modeling module is used for obtaining the contact force between the contact end and the human tissue by utilizing the processed image information. For the six-dimensional force sensor based on image feedback, the six-dimensional force sensing clamping probe based on image feedback, and the six-dimensional force sensing clamping apparatus based on image feedback provided by the invention, the detection method based on image feedback is adopted, so that a doctor can effectively know the clamping force between the tail end of the surgical instrument andthe human tissue of a patient, and thus the efficiency and safety of the surgery are improved.

The invention provides an information matching method and system based on mobile terminal privacy protection. The method comprises the steps of preprocessing parameters, matching the physical position of a mobile terminal, matching the interest of a user, and finally calculating the information matching degree of the user to obtain the information matching degree. By the adoption of the method and system, privacy protection safety and practicality are high, potential safety hazards caused by using of third-party services are avoided, communication can be conducted directly among users, the privacy of each user is prevented from being leaked, and functions of the prior art can also be realized; privacy information matching verification is also achieved, and the matching information ratio each piece of information must reach is regulated so that the user can use the system more conveniently and rapidly.

The invention relates to a method for detecting the abnormal changes of secondary images used for car security, and belongs to the technical field of computer application. The method comprises the following steps: firstly, the image collection on a real-time basis is performed on videos inside and outside the car; then, abnormal change detection is respectively performed on the images collected inside and outside the car on the real-time basis by adopting self-adapting difference detection algorithm for video image, so as to obtain two detection results of normal image and abnormal changing images; the quantity of images with abnormal changes serves as the frequency of continuously abnormal changes; and when both the frequencies of continuously abnormal changes inside and outside the car reach a pre-established threshold value respectively, a judgment that the car is stolen is made. In the invention, only the video image collecting device is used, and no additional sensor is used except a camera, therefore, the invention has the advantages of simplicity, practicability, safety and reliability.

The invention discloses an anti-settlement device for a foundation of an additionally-mounted elevator and a construction method thereof. The anti-settlement device comprises anti-settlement piles, ananti-settlement box, a rubber box, a rubber cover plate, an anti-settlement cover plate, an anti-settlement column, spring columns, elastic fillers, first connecting pieces and second connecting pieces. The structure is simple, very common materials are adopted, the construction cost and the material cost are low, construction is fast, normal life needs of people are not affected, practicality ishigh, and popularizing is easy; connecting between an elevator shaft and the elevator foundation are well reinforced, when the elevator shaft moves, the quite good buffering effect is achieved, the cooperative work effect is generated between the shaft and the foundation, the good using effect can be achieved whether lateral moving or vertical moving, the quite good reinforcing effect is achieved, and the traveling safety of people is guaranteed.

The invention relates to an air-pressure regulating automatic alarm device for a laser cutter. The air-pressure regulating automatic alarm device comprises a cutter body, wherein a laser head is arranged on the cutter body; the laser head is connected with an auxiliary gas container; the air-pressure regulating automatic alarm device is characterized in that a solenoid valve is connected between the laser head and the auxiliary gas container, wherein the solenoid valve is connected with the cutter body; an air-pressure regulating alarm display meter is connected between the solenoid valve and the laser head; the air-pressure regulating alarm display meter is connected with an alarm lamp. The air-pressure regulating automatic alarm device has the benefits that when the air pressure is higher than or lower than a set range during working, the solenoid valve controls the machine body to stop working; meanwhile, the air pressure regulating device alarms to a give warning to the operation staff, so that the working air can be checked as soon as possible, the problem that the working effect of the machine is not good due to insufficient air pressure or excessively high air pressure can be effectively solved, potential safety hazards can be effectively eliminated, the working efficiency is improved, and the potential safety hazards are lowered.

The invention discloses an intelligent inspection system for downholes. The intelligent inspection system comprises a flexible guide rail (2), a robot trolley (3), a light source (5), a camera (6), atemperature sensor (7), a composite gas detection sensor (8), an optical fiber sensor (9), a data processing module (11), a master control module (12), a storage module (14), a central control system(16), a data receiving module (4), a data transmitting module (13) and a power module (15). The flexible guide rail (2) is fixedly arranged on an in-pit side wall (1) and guides the robot trolley (3).The robot trolley (3) is used for carrying a detection module, the data processing module and the control module, and is arranged on the flexible guide rail (2). The light source (5), the camera (6),the temperature sensor (7), the composite gas detection sensor (8) and the optical fiber sensor (9) are used for detecting data. The data processing module (11), the master control module (12), the storage module (14) and the central control system (16) are used for processing the detected data. The data receiving module (4) and the data transmitting module (13) are used for transmitting the data. The power module (15) is used for powering the robot trolley (3). The intelligent inspection system has the advantages that potential downhole safety hazards can be discovered timely, downhole safety can be improved, and detection cost is reduced.

The invention provides a repairing system for water leakage in a kitchen and a bathroom, and relates to the technical field of building engineering. The repairing system comprises a structure weak part repairing system and a pipeline and internal corner part repairing system. A machining groove is chiseled in a structure weak part, and grouting, painting of a basic layer interface agent, reinforcement of repairing mortar, painting of waterproof paint, laying and attaching of polyester cloth and secondary painting of waterproof paint for waterproof treatment are performed. At pipeline and internal corner portions, internal corners and a pipeline side are grooved, painting of a basic interface agent, reinforcement of repairing mortar, paining of waterproof paint, laying and attaching of polyester cloth and secondary painting of waterproof paint for waterproof treatment are performed, and finally overall painting of repairing mortar, painting of rigid waterproof paint and high-elasticitywaterproof paint and other waterproof treatment are performed. Multiple materials and multiple technologies are adopted and combined as a whole, and the problem of water leakage in the kitchen and thebathroom is solved systematically.

The invention belongs to the technical field of organic synthesis, and particularly relates to a phenol and hydrogen peroxide hydroxylation microchannel reaction method. The method comprises the steps of mixing the raw materials phenol, water, hydrogen peroxide and a water-soluble catalyst according to certain proportions to prepare a raw material solution, adding the raw material solution into a mixing tank, setting the reaction temperature of a microchannel reactor to be 30-150 DEG C, and inputting the raw material solution into the microchannel reactor at the flow rate of 5-150 mL / min through continuous charging and discharging for hydroxylation reaction, so that catechol and hydroquinone are obtained. The method is simple, operation is convenient, the conversion rate is high, selectivity is high, efficiency is high, and the content of tar in reaction liquid is low.

The embodiment of the invention discloses a construction method for excavating square piles through a rotary excavating machine and a square chiseling head combined. The construction method comprisesthe following steps that (1) pile casings are embedded; (2) pile positions are set out; (3) small drilled holes are subjected to rotary excavating; (4) large drilled holes are subjected to rotary excavating; (5) the square chiseling head conducts trimming and hole clearing, and the square chiseling head comprises a connecting part and a square pipe, wherein one end of the connecting part is detachably connected with a drill rod of the rotary excavating machine, one end of the square pipe is fixedly connected with the outer wall of the connecting part, a notch is formed in the other end of thesquare pipe, and the notch is provided with a plurality of bucket teeth at intervals; and (6) pile hole forming detection is conducted, reinforcement skeletons are mounted, pile foundation concrete ispoured, the pile casings are detachably and pulled, thus the square piles are formed, and square pile construction is completed. According to the construction method, by designing the square chiseling head, after the rotary excavating machine adopts a traditional rotary excavating drill bit to drill circular holes, the rotary excavating drill bit is replaced with the square chiseling head, the inner walls of the pile holes are trimmed, thus a mechanical trimming mode of the square chiseling head replaces an existing manual excavating mode, the construction duration is obviously shortened, andthe construction efficiency is improved.

The invention relates to the field of teaching equipment, in particular to equipment for computer multimedia teaching. The equipment comprises a bottom plate, a projection mechanism, a dust removing mechanism and a teaching blackboard. A lifting mechanism is arranged at the top of the bottom plate and comprises a mounting plate and two symmetrically-arranged material transferring assemblies. Two side plates are arranged at the bottoms of the two ends of the mounting plate correspondingly. The dust removing mechanism comprises a mist-spraying dust fall assembly and a dust collector. A teachingtable is arranged at the top of the bottom plate and internally provided with an accommodating cavity, and a computer is arranged in the accommodating cavity. The equipment for computer multimedia teaching has the beneficial effects that the projection angle of a projector can be automatically adjusted through the projection mechanism, a teacher does not need to conduct manual adjustment, and thusconvenience is brought to the teacher; and dust generated by using chalk can be automatically subjected to mist spraying and electrostatic dust removing treatment through the dust removing mechanism,so that the situation that large potential safety hazards are brought to the teacher and students due to the excessive dust is avoided.

The invention discloses a mounting method of a propulsion device, comprising the following steps: S10, providing an elevator, a propulsion device, a three-dimensional jacking machine and a hull section of the propulsion device to be installed, fixing the hull section on a construction plane, so that the hull section is located above the construction plane; S20, hoisting the propulsion device on the lifting vehicle, and lifting the propulsion device to the first height position by the lifting vehicle; S30, displacing the propulsion device from the first height position to the mounting positionof the propulsion device by the three-dimensional jacking machine; and S40, connecting the propulsion device with the steering device arranged at the mounting position. It can be used for mounting heavy propulsion units.

The invention relates to a recycling processing treatment system for steelmaking processing waste steel slag. The system comprises a shell, a flow guide frame, supporting plates, a first crushing mechanism, a shaking mechanism and a second crushing mechanism, wherein the shell is of a concentric-square-shaped structure with openings in the upper end and the lower end, the flow guide frame is installed at the upper end of the shell, the supporting plates are symmetrically installed on the left side and the right side of the lower end of the shell, and the first crushing mechanism, the shaking mechanism and the second crushing mechanism are sequentially arranged in the shell from top to bottom. With the system, the following problems existing when an existing large jaw crusher is used for carrying out jaw crushing on the steel slag can be solved: after the steel slag is subjected to jaw crushing of a primary degree, a finer jaw crusher needs to be used for carrying out secondary jaw crushing on the steel slag, and consequently, the jaw crushing efficiency of the steel slag is low; the steel slag is easily adhered to the surfaces of jaw crushing columns, so that the jaw crushing columns are easily stuck by the adhered steel slag, and then the jaw crusher is frequently maintained; and the jaw crushing effect of the existing machine is poor, so that ball-milling time of the steel slag after jaw crushing needs to be prolonged.