111results about How to "Reduce loss and waste" patented technology

The invention discloses a cold-chain logistics management device with the shelf life prediction function, a method of the cold-chain logistics management device and application of the cold-chain logistics management device. The cold-chain logistics management device comprises a temperature sensor, a humidity sensor, a carbon dioxide sensor, an ethylene sensor, a microprocessor unit, a display unit, an RFID storage unit and an RFID read-write unit. A user sends information such as the start record, the temperature collection interval, the product type and the initial shelf life to a cold-chain logistics management RFID card through any handset with an RFID data format before a product is placed on a shelf, and then the cold-chain logistics management RFID card is attached to the target product. After the cold-chain logistics management device is started, the display unit displays the initial shelf life, and the sensors transmit collected data to the microprocessor unit, calculate the remaining shelf life according to a shelf life prediction model by combining the specific product type, and display the remaining shelf life on the display unit. The cold-chain logistics management device with the shelf life prediction function, the method of the cold-chain logistics management device and application of the cold-chain logistics management device can achieve direct prediction of the real-time remaining shelf life of food or agricultural products.

The invention discloses a manufacturing method of milk protein fiber or filament or blended yarn dyeing and yarn-colored product, which is characterized by the following: changing coiling density of yarn; controlling heating temperature; adopting segmented contraction in the cylinder yarn dyeing course; adding self-producing milk protein fiber dyeing specific adjuvant; utilizing polyacrylonitile or polyvinyl acetate alcohol as carrier realize active dyeing technology of milk protein fiber; solving the difficulties of flower color, weak color and bad fastening degree problem to produce excellent washing shrinkage and stable size yarn-dyed product through weaving, shrinking and softening and final disposal.

The invention discloses a virtualization-based video content analyzing method and system. The method and the system are characterized by comprising main parts, namely resource requirement analysis, task scheduling and equilibrium control allocation of analysis of video content. According to the method and the system, the content significance in the video is assessed; different content analyzing methods in the video are grouped into three types; a resource tank for analyzing the video content is managed and scheduled; seven scheduling modes are customized; multiple different scheduling policies are selected for different video content analyzing types, thereby ensuring the reliable analysis of different content in the video, implementing efficient utilization of treatment resources and reducing the waste and loss of the system resources.

The invention discloses Chinese gooseberry fermented wine and a preparation method thereof. The preparation method comprises the following steps of: (1) sorting fresh fruits; (2) washing; (3) crushing; (4) pulping and adding enzyme; (5) adjusting sugar degree; (6) sterilizing; (7) inoculating and fermenting; (8) hermetically standing the fermented wild Chinese gooseberry wine at the temperature of between 15 and 20 DEG C for 10 to 15 days; (9) deacidifying by a physical method; (10) clarifying; and (11) ultrafiltering under the conditions of operating pressure of 0.04 MPa, operating temperature of between 20 and 25 DEG C and feed liquid flow rate of 6 L / h, wherein after ultrafiltering for 17 minutes, the flow tends to be stable. The Chinese gooseberry green wine prepared by the method can completely utilize fruit resources of the Chinese gooseberries, in particular secondary fruits so as to reduce loss and waste and greatly improve production value of the fruits.

The breeding process of polyodon spathula belongs to the field of aquatic raising technology. The breeding process includes throwing rotifer and euglena as feed with the cultivation density of 2000-6000 / cu m for fry polyodon spathula and 400-1100 / cu m for small polyodon spathula. The breeding process has high survival rate, high utilization of feed and low cultivation cost.

The invention provides a grain combine harvester with a drying function, and belongs to agricultural machinery. A hot smoke acquiring and distributing device is fitted on a grain harvester combine body and is communicated with a hot smoke exhausting pipe of engine. Hot gas delivering pipes communicate the hot smoke acquiring and distributing device to a threshing device, a separating device, a selecting device, a grain delivering device, a grain bin and a grain discharging device. The heat of hot waste gas exhausted by the engine of the grain harvester combine is utilized, heat is added in each mechanical device for the grains in the grain combine harvester to pass by, accordingly the grains can be dried, parts of free water and combined water in the grains are allowed to evaporate, beneficial conditions are created for post-operation of a drier, and the grain combine harvester has the advantages that novel and reasonable design, fine operating effect, reliability of usage, efficient drying energy and low drying cost.

The invention relates to a preparation method of yangtao green fruit wine, comprising the technical steps of mixing materials, extracting, filtering, standing, refiltering and obtaining the finished product. The yangtao green fruit wine prepared by the invention ensures that the nutrient components of the yangtao is fully extracted and utilized, and the yangtao green wine with high or low degrees has limpid and light green chroma, favorable impression and good health-care effect; besides, the variety of the yangtao green fruit wine is increased so as to satisfy the requirements of different consumers.

The invention discloses a chilled fresh pork shelf life span forecasting method based on an internet of things architecture. The method comprises the following steps of collecting environmental parameters of a shelf through a collection device arranged on the site every fixed time interval, and sending the environmental parameters to a remote terminal, wherein the environmental parameters comprise shelf temperature; displaying the received environmental parameters by the remote terminal, and calculating the residual shelf life of chilled fresh pork every 2-5 hours according to the current received shelf temperature. According to the chilled fresh pork shelf life span forecasting method, the concept of conventional food expiration date is broken through, and the pork quality is entitled with a safely and dynamically changed shelf life, so that the residual shelf life can be forecast, and sales personnel has an intuitive and convenient understanding on the shelf life span; furthermore, the sales personnel can be instructed to effectively adjust sales measures for the chilled fresh pork according to the residual shelf life of a product, and loss and waste as well as harmful effects on customers caused by deterioration of the product are reduced.

The invention provides an electric vehicle distributed energy storage method, device and equipment and a medium. The method comprises the steps: receiving a parameter setting request initiated by a client, and setting the energy storage parameters of an electric vehicle unit according to the parameter setting request; receiving the rated maximum storage electric quantity and the current remainingelectric quantity percentage transmitted by the charging and discharging unit, obtaining the charging power value set by the charging and discharging unit, and calculating the charging time; the method comprises the following steps: acquiring a local power consumption peak period, performing power supply judgment on a power grid according to the power consumption peak period, checking idle electric vehicle units when the power grid is in the power consumption peak period, and issuing a power supply control instruction to a charging and discharging unit; and charging judgment is performed on the electric vehicle unit according to the current residual electric quantity percentage, the energy storage parameter and the electricity price time period, and a charging control instruction is issuedto the charging and discharging unit according to a judgment result. According to the invention, the power supply pressure of a power system in a power consumption peak can be well relieved, so thatthe electric energy of the electric vehicle is fully utilized.

The invention relates to the field of manufacturing of artificial panels, in particular to a manufacturing method of a bamboo fiber shaving board. The manufacturing method comprises the following steps: (1) drying bamboo shaving and then gluing with MDI glue water; (2) cleaning the bamboo shaving, then feeding the bamboo shaving into a defibrater, adding paraffin, adding modified UF glue, drying, and then feeding into a surface layer fiber bin; (3) manufacturing board blanks of which the upper surfaces and the lower surfaces in the thickness direction have surface layer fibers and the middles have the bamboo shaving by using a five-head paver; (4) carrying out pre-pressing forming on the board blanks obtained from the step (3) by using a pre-pressing machine, and then feeding the board blanks to a pressing machine for hot pressing; and (5) cutting, cooling, stacking, sanding and trimming shaving boards subjected to hot-pressing forming in the step (4) so as to obtain the bamboo fiber shaving board. According to the manufacturing method of the bamboo fiber shaving board, the bamboo fiber shaving board is a full-bamboo-structure shaving board of which the surface layers are made of bamboo fibers and the core layer is made of the bamboo shaving, the shaving of the core layer is distributed longitudinally and transversely, loss waste of forest resources is reduced, and various physical performance indexes of the produced shaving board can reach national standards.

The invention relates to charging devices for electric automobiles, in particular to an active intelligent mobile charging and battery replacing system. Aiming at the problems of inconvenient use andpoor use experience of the existing fixed charging piles, the active intelligent mobile charging and battery replacing system is provided. The system comprises an energy storage module with built-in storage batteries, a charging robot installed with an energy storage module, an electric delivery vehicle for conveying the energy storage module, an energy storage station for storing the energy storage module and a remote control platform. The energy storage station is externally connected with a power supply; the charging robot can move to a designated position and charge the parked electric automobile through the built-in energy storage module; the electric conveying vehicle conveys the energy storage module between the charging robot and the energy storage station. The energy storage station is externally connected with a power supply for charging the energy storage module or inverting the electric energy of the energy storage module. The charging robot, the electric delivery vehicle and the energy storage station are in communication connection with the remote control platform. The system provides an intelligent mobile charging service, which is characterized in that electricity is taken nearly in a valley period of a power grid, and delivered nearly in a peak period of a power grid. Electric energy loss is reduced.

The invention relates to the technical field of peanut straw feed processing, in particular to a method for producing pellet feed for sheep from peanut straw. The pellet feed for the sheep is prepared from raw materials by weight as follows: 53%-65% of peanut straw, 2%-5% of pine needle powder, 4.7%-8% of soybean meal, 4%-7% of corn flour, 4%-8% of Pennisetum sinese, 5%-8% of carrots, 2%-4% of yeast powder, 1%-3% of cane sugar molasses, 2%-5% of a compound premix, 0.2%-0.3% of monensin sodium, 0.1%-0.2% of bacitracin zinc, 1.0%-2.0% of table salt and the balance of distillers' grain powder. The pellet feed for the sheep has comprehensive nutritional ingredients and high benefits and is low in cost, high in cellulose content, good in palatability, proper in energy content, high in digestion rate, convenient to transport and long in storage time and cannot easily deteriorate.

The invention belongs to the technical field of feed processing, and particularly relates to herbivorous animal mixed feed which comprises, by weight, 120-140 parts of straw, 10-18 parts of corn flour, 8-15 parts of bean pulp, 5-12 parts of vinasse powder, 6-10 parts of pine needles, 4-8 parts of yeast powder, 2-6 parts of sucrose molasses, 2-6 parts of premix and 0.2-0.8 part of rumen protected methionine. The invention further discloses a preparation method of the mixed feed. Raw materials of the mixed feed are weighed in parts by weight, and then straw pretreatment, mixing treatment, mixed powder curing, granulation and packaging are sequentially performed to obtain finished mixed feed. The mixed feed is low in cost, high in benefit, comprehensive in nutrient value, high in cellulose content, good in palatability, easy to store and transport and free from deterioration.

The invention discloses a method for extracting DHA from a marine microalgae fermentation liquor, and belongs to the technical field of extraction of microbial oil and the method can be used for solving the problems that the DHA extraction rate is low and the product is poor in quality in the prior art. The method disclosed by the invention is used for extracting the DHA by using the technical steps such as an enzyme-method wall breaking treatment, extraction of crude oil through centrifugal separation, refining and purification, wherein by virtue of the enzyme-method wall breaking treatment, the cell-wall breaking ratio can be increased and the DHA contained in cells can be fully released, so that the DHA extraction rate is greatly increased, loss and waste are reduced, and the production cost is lowered; in the centrifugal separation step, other harmful substances are not added, so that the quality of the DHA is guaranteed; by virtue of the refining step and the purification step, the purity and quality of a DHA finished product can be further improved. The method disclosed by the invention can be used for increasing the extraction rate of the DHA, the total extraction rate is over 80%, waste is reduced, the production cost is lowered, the quality of DHA algae oil is also improved, and the product performance is safe.

Disclosed are a combined packing box for customers to purchase conveniently and a using method thereof. By being combined with application of existing rules of post codes, advanced refrigerating and thermal preserving technology, network information spreading technology, self-service charging terminal technology, intelligent lock locking and unlocking technology and remote control technology, the combined packing box with retailing transaction functions including placing an order, storing, valuating, paying and the like is manufactured in an optimized and combined manner and a field mounting application method convenient for the customers is provided. By the combined packing box, contradiction of supply and demand between production and consumption can be solved to the greatest extent, credit balance of customers and merchants is achieved, price stability and circular economy development are benefited, and the combined packing box has significance for sustainable development and civilization progress of the entire society.

The invention discloses an electric vehicle and a power driving device thereof, comprising a driving motor, a speed reducer and a braking mechanism integrated in a hub of the electric vehicle; Drivingmotor is disc motor with axial magnetic field; The reducer is used for transmitting the power on the motor shaft of the drive motor to the rim of the hub; The brake mechanism includes a hub flange fixedly connected to a wheel rim, a brake pad fixed to the hub flange, and a brake caliper for mating with the brake pad, the brake caliper being used for connecting with a brake actuating unit of an electric vehicle. The above pow drive device, By integrating the driving motor, the speed reducer and the braking mechanism into the hub of the electric vehicle, the torque output from the driving motorcan be directly transmitted to the hub only through the speed reducer, thereby avoiding the complicated transmission system, reducing the loss and waste of power in the transmission system and greatly improving the overall transmission efficiency.

The invention relates to an antibacterial fresh-keeping packaging bag special for rice and a processing method thereof. At present, most of rice packages in China mainly adopt common plastic woven bags to package products, and in order to prevent rice leakage, the outer surfaces of the common plastic woven bags are coated with a coating layer of polyethylene or polypropylene materials. The plastic woven bags have no desinsection and sterilization performances and reduce the guarantee period of the rice. The invention provides a plastic woven bag and a coating layer membrane with vent holes coated on the outer surface, wherein the coating layer membrane material coated on the outer surface of the plastic woven bag consists of the master batch of a zinc oxide crystal whisker nano composite material and the master batch of a polyethylene (PE) or polypropylene (PP) material which are matched together, and the proportion of each component in percentage by weight is that the zinc oxide crystal whisker nano composite material accounts for 1 to 17 percent, and the polyethylene (PE) or the polypropylene (PP) material accounts for 83 to 99 percent. The plastic woven bag is used as the antibacterial fresh-keeping packaging bag special for the rice.

The invention relates to the technical field of sugarcane straw feed processing and particularly relates to a method of preparing a granular feed for beef cattle by means of straw or leaf tails of sugarcane. The granular feed for beef cattle is composed of, by weight, 61-80% of the straw or leaf tails of sugarcane, 5-8% of corn flour, 3.7-7% of soybean meal, 4-8% of distiller grain powder, 3-5% of yeast powder, 2-5% of sucrose molasses, 2-5% of a premix, 0.2-0.7% of rumen protected methionine, and 0.1-0.3% of peptone. The preparation method includes the steps of: weighing the raw materials of the compound feed according to the weight part ratio, successively performing straw pretreatment, raw material fermentation treatment and pretreatment of a mixed premix, and granulating and packaging the product to obtain the granular feed for beef cattle. The granular feed for beef cattle has low cost, high economic benefit, balanced and comprehensive nutritional value, high cellulose content, good palatability, proper energy content and high digestion rate, and is easy to store, transport and is free of deterioration.

The invention discloses an EPS plastic foam cooling water circulating system, which comprises a cooling device, a first settling pond, a second settling pond and a reservoir, wherein a water outlet is formed in the cooling device; the water outlet is connected with a cooling water receiving system through a pipeline; the cooling water receiving system, the first settling pond, the second settling pond and the reservoir are sequentially connected with one another through a pipeline; a filter net or a filter is arranged between the first settling pond and the second settling pond; water softening equipment is arranged between the second settling pond and the reservoir; air cooling equipment is arranged between the water softening equipment and the reservoir; and the reservoir is connected with the cooling device through the pipeline. The overall pipeline cycle control is achieved; losses and waste of cooling water in the circulating process are reduced; a manual operation is reduced; the cooled water is clarified; pipe blockage is avoided; water hardness is softened; workshop production equipment and an EPS plastic foam mold are protected; the service lifetime is prolonged; the maintenance cost is reduced; and the yield of EPS foam is improved.

The invention belongs to the technical field of food processing, and particularly discloses multi-coarse cereal fine dried noodles and a preparation method thereof. The multi-coarse cereal fine driednoodles are prepared from the following raw materials in parts by weight: 100 parts of special refined wheat flour, 4-6 parts of quinoa powder, 1-2 parts of pea meal, 2-3 parts of corn flour, 3-4 parts of millet flour, 1-3 parts of purple rice flour, 2-3 parts of black rice powder, 1-2 parts of edible salt, 2-3 parts of vital wheat gluten and 0.1-0.2 part of dietary alkali. Through working procedures of performing mixing and screening, performing kneading to obtain dough, performing standing and curing, performing repeated pressing, performing four-region baking and the like, finished productsare obtained. The made fine dried noodle finished products contain nutrient substances of amino acids, vitamins, protein, minerals and the like which can be supplemented for human bodies, the fine dried noodles are uniform in color, smooth in surface, good in mouth feel, not liable to break, resistant to cook, and clear in soup color.

The invention discloses a high-fatigue-resistance composite material automobile plate spring and a manufacturing method thereof. The high-fatigue-resistance composite material automobile plate springcomprises at least one layer of unidirectional fiber layer which is stacked and laid, and at least one layer of two-dimensional braided sleeve which sleeves the outer surface of the unidirectional fiber layer. The manufacturing method comprises the following steps: stacking and laying at least one layer of the unidirectional fiber layer; sleeving the at least one layer of the two-dimensional braided sleeve on at least one layer of the unidirectional fiber layer with the at least one layer of two-dimensional braided sleeve to prepare a fiber pre-molded body; putting the fiber pre-molded body into a molding mold, and adopting a molding technology for immersing, curing, de-molding and trimming to obtain the composite material automobile plate spring. According to the high-fatigue-resistance composite material automobile plate spring, the properties of continuous fibers, controllable angles and good mold adhering performance in the two-dimensional braided sleeve are utilized and the automobile plate spring with high fatigue resistance and excellent inter-laminar shearing resistance is prepared; the preparation technology is simple and the problems that a traditional pure unidirectionallaid fiber plate spring has no restriction in an annular direction and poor fatigue resistance and a three-dimensional pre-molded body braiding technology is complicated are effectively avoided.

The invention relates to a hydraulic clamping device for batch plates, and belongs to the processing machinery of plate samples. The hydraulic clamping device is characterized in that: a rolling-over shaft and a rolling-over oil cylinder are arranged on a clamping base; the rolling-over shaft is connected with the rolling-over oil cylinder; two fixed jaws which are arranged oppositely are arranged on the rolling-over shaft and can realize the rolling-over of 90 degrees; a movable jaw is arranged on the fixed jaw on one side; a clamping oil cylinder is arranged on the fixed jaws, is positioned below the movable jaw and is connected with the movable jaw; the fixed jaws and the movable jaw are provided with gaps matched with a band saw; and a floating pressure head is arranged on the movable jaw. The device realizes the full clamping, steering and positioning of the batch plates, completes the continuous cutting and forming of the plate samples by matching with a band saw cutting device, and has the characteristics of reasonable structure, high operational efficiency and machining accuracy, little material loss and low cost of the samples.

The invention discloses a large tonnage pile static loading test ballasting platform counter-force device and a mounting method thereof. In the device, rectangular steel-concrete bearing bedplates with frames (1a) are staggered and stacked to form an inverted pyramidal cascade ballasting platform counter-force device seat (2); the center of each steel-concrete bearing bedplate is provided with a sunk lock hole (3), and four corners of the steel-concrete bearing bedplate are provided with a quarter sunk lock hole respectively; and adjacent steel-concrete bearing bedplates are in limited connection through a latch (4) in the horizontal direction, and are fixed through bolts through the sunk lock holes or anchored by a steel cable in the vertical direction. The mounting method comprises the following steps of: treating a foundation, and mounting a static bearing pedestal; assembling the ballasting platform counter-force device seat; and stacking cuboid ballast boxes on the ballasting platform counter-force device seat in a staggered way to form a ballasting platform counter-force device counterweight body. Construction members for erecting a piled weight platform are convenient to manufacture and transport, can be erected into the piled weight platform in the field of the building site; the structure is simple and safe, and the manufacturing cost is low; and the mounting method is simple and safe, and is easy to implement.

The invention discloses a HIT solar cell recycling pretreatment method. The method comprises the following steps that back aluminum, an aluminum silicon alloy and a silver electrode of an HIT solar cell are removed with a sodium hydroxide solution, a silicon nitride anti-reflection layer and the silver electrode are removed with hydrofluoric acid, silicic acid is dissolved with sodium hydroxide, air is introduced into the silicic acid to extract the silicic acid, and silica is generated after water loss; and the silver electrode is dissolved with the nitric acid, sodium chloride is added, AgCl+ precipitate is obtained, and silver is obtained after iron powder replacement. By the adoption of the method, the waste HIT solar cell and silver powder which are convenient for subsequent indium recovery are obtained and can be directly used as a raw material in the indium recovery process and a raw material for silver recycling.

The invention provides an energy-saving and environment-friendly synthesis technology for 1,2,4-1H triazole. The technology comprises following steps: S1, a formamide raw material is totally put in areaction kettle in advance, hydrazine hydrate is slowly added to formamide from an elevated tank, and a main product 1,2,4-1H triazole is produced through reaction; S2, ammonia produced in S1 enters an acid spraying device through a gas phase inlet, formic acid enters the acid spraying device through an acid inlet, and cooled ammonia and sprayed formic acid react to produce ammonium formate; S3, ammonium formate produced in S2 is cooled in the acid spraying device, flows back to the reaction kettle and reacts with hydrazine hydrate, and the main product 1,2,4-1H triazole is produced. Accordingto the energy-saving and environment-friendly synthesis technology for 1,2,4-1H triazole, formic acid is added to the acid spraying device, so that firstly, production of ammonia as a byproduct is reduced, secondly, the byproduct ammonia is used sufficiently, consumption of formamide is reduced, the use is convenient, and the raw materials are saved.

The invention discloses a biomass combustible gas tar separation and removal apparatus, comprising a primary cooling tar separator and a secondary cooling tar separator identical in structure, each comprising a device cavity condenser, an upper tar-collecting plate and a lower tar-collecting plate; the top of a device cavity is provided with a conveying pipe connector intake port connected with a conveying pipe, gas is subjected to primary cooling dust removal and secondary cooling dust removal and the enters the condenser, and the gas is condensed to and separate and remove pyroligneous liquor and is cooled again; the gas then enters the primary cooling tar separator to remove most of tar and is also cooled, the gas is then charged into the secondary cooling tar separator to purify and remove the tar, the residual tar in the gas is further removed, the gas is cooled, and the combustible gas completely purified and fully cooled through kinetic energy of a fan is stored in a gas storage tank for standby.

The invention relates to a foundation pit soldier pile supporting system and a construction method thereof. The foundation pit soldier pile supporting system comprises a diagonal brace pile foundationcushion cap, a soldier pile structure and a plurality of groups of diagonal braces supported between the diagonal brace pile foundation cushion cap and the soldier pile structure; the diagonal bracepile foundation cushion cap comprises a supporting platform and supporting piles; the supporting platform is positioned under a structure wall body; the supporting piles are supported at the bottom ofthe supporting platform; the soldier pile structure comprises a soldier pile, a crown beam and a breast beam; the crown beam is arranged on the top surface of the soldier pile; the breast beam is arranged in the middle of the soldier pile and faces one side of a foundation pit; and each group of the diagonal braces comprises a steel diagonal brace I arranged between the crown beam and the supporting platform. Under the conditions that an underground structure is heavy in construction task, the construction period is tight, and the surrounding environment is complicated, the supporting safetyrequired in design is very high, the supporting requirements of most of foundation pits can be met by applying steel diagonal braces with the pile caps as foundations onto the crown beam and the breast beam of the soldier pile, and in addition, diagonal bracing replaces horizontal bracing, so that the problem that the construction of the foundation pit is affected by cumbersome processes such as horizontal bracing removing is solved, and the construction period is saved.

The invention discloses a method for manufacturing a variable-diameter conical composite insulator core pipe. A reinforcing material adopts equal-diameter glass fiber two-dimensional weaving sleeves. The method comprises the following steps of: according to the size of a composite insulator core pipe product, selecting the equal-diameter glass fiber two-dimensional weaving sleeves of corresponding specification, and cutting into the glass fiber two-dimensional weaving sleeves with the length which corresponds to the size of the composite insulator core pipe product; sleeving the weaving sleeves on a variable-diameter conical core mold, which is treated by a mold release agent, in a layered mode; applying tension to both ends of the weaving sleeves to make the weaving sleeves tensioned andtightly sleeved on the mold; sleeving the next layer of the weaving sleeve in the same mode, and controlling the number of layers of the weaving sleeves until the thickness is equal to the thickness of the product; by using a vacuum auxiliary dipping resin method, digging the glass fiber sleeves on the mold by resin; and curing, de-molding, cutting two ends to be flush with each other, and smoothly grinding the two ends to obtain the variable-diameter conical composite insulator core pipe. The variable-diameter conical composite insulator core pipe which is prepared by using the method is high in strength and uniform in wall thickness; secondary processing is not required; and production efficiency is improved.

The invention discloses a preparation method of fruit and vegetable preservative paper, and relates to the technical field of preservative paper preparation. The preparation method comprises the following steps: (1) compounding a cinnamon extract, a galangal extract, a cimicifugae foetidae extract, a mint extract and a rhizoma atractylodis extract into a mixed preservative; (2) placing the porous adsorption capsule in deionized water to prepare an adsorption solution, and adding the mixed preservative into the adsorption solution to obtain a preservation capsule; (3) dissolving starch in water to prepare a starch solution; (4) dissolving chitosan in an acetic acid aqueous solution to prepare a chitosan solution; (5) mixing a starch solution, a chitosan solution, a fresh-keeping capsule and deionized water to prepare a spraying solution; and (6) spraying and sizing the spraying liquid on the surface of packaging base paper to obtain the fruit and vegetable preservative paper. The preservative paper disclosed by the invention can play a role in inhibiting bacteria, reducing the metabolic rate of fruits and vegetables, delaying the dehydration of the fruits and vegetables, keeping the freshness of the fruits and vegetables and prolonging the preservation time.