696results about How to "Health hazard" patented technology

The invention discloses an impeller type washing machine with a spraying barrel cleaning function. The washing machine comprises a shell, an outer barrel and an inner barrel, wherein the outer barrel is positioned in the shell and used for storing washing water; the inner barrel is arranged in the outer barrel and used for accommodating washing clothes; a spraying device is arranged between the inner barrel and the outer barrel, can clean the walls of the inner barrel and the outer barrel simultaneously, is communicated with the water inlet of the washing machine, and comprises an annular sprayer and a water inlet hose; the annular sprayer is fixedly sleeved between the inner barrel and the outer barrel; one end of the water inlet hose is communicated with the annular sprayer, and the other end of the water inlet hose is communicated with the water inlet of the washing machine; the annular sprayer is provided with inward and outward spraying water outlets along the circumference, and is provided with at least two spraying water inlets; the outer barrel is provided with through holes corresponding to the spraying water inlets; and the spraying water inlets pass through the through holes and are communicated with the water inlet of the washing machine through the water inlet hose. The washing machine has the characteristics of simple structure, low cost and good barrel cleaning effect. The invention also discloses a spraying control method of the impeller type washing machine with the spraying barrel cleaning function.

The invention relates to a temperature control dry heating prevention electronic cigarette and a temperature control method thereof. The temperature control dry heating prevention electronic cigarette comprises a housing, a liquid storage device, an atomization assembly with an atomization chamber and a heating element, a power supply and a circuit control board with a smoking switch, wherein the liquid storage device, the atomization assembly, the power supply and the circuit control board are mounted in the housing in a sleeve mode. The circuit control board provided with a power management module and a temperature sensing unit, wherein the temperature sensing unit comprises a temperature sensor capable of sensing temperature signals of the atomization chamber and converting the temperature signals into temperature electrical signals to be transmitted the power management module, and the power management module determines and deals with the temperature electrical signals to generate control electrical signals for controlling the heating element to be connected to or disconnected to the power supply. The temperature control dry heating prevention electronic cigarette has the advantages of being capable of preventing the dry heating of the heating element of the atomization assembly for preventing the harmful gas and burning smell from being sucked into a human body and the harm to the health of the human body by using the temperature sensor to detect and control the temperature of the atomization chamber.

The invention relates to an infrared induction temperature control e-cigarette and a temperature control method thereof. The infrared induction temperature control e-cigarette comprises a shell, a liquid storage device nested in the shell, an atomization component, a heating element R in the atomization component, a power supply and a circuit control panel with a smoking switch SW. The circuit control panel comprises an infrared temperature induction unit and a power supply management module. The infrared temperature induction unit can receive an infrared radiation signal which is sent from the heating element R and which represents a certain temperature, then converts the same into a temperature electric signal and sends the temperature electric signal to the power supply management module. After judgment and processing, the power supply management module generates a control electric signal to control the heating element R to be connected / disconnected with the power supply. According to the arrangement, with the infrared temperature induction unit, the temperature in an atomization chamber is detected and controlled, and the atomizer is protected from dry burn. Thus noxious gas and burnt flavor are prevented from entering human bodies, and human health is protected.

The invention discloses a thiazole zinc suspending agent and process for preparation, wherein, the suspending agent contains thiazole zinc 5-60%, wetting agent 3-8%, dispersing agent 1-5%, thickening agent 0-3%, anti-freeze agent 0-5%, antiseptic 0-1% and defoaming agent 0-0.5% and water allowance. The medicament is evenly dispersed and manufactured by adopting arts of combination of sandblast or high-shear homogeneity and sandblast, or combination of high-shear homogeneity and high pressure homogeneity. The medicament has high efficiency, which can effectively prevent and cure bacterial diseases such as rice bacterial blight, striped disease and citrus ulcer and the like, and uses water as dispersed medium, and has little environmental pollution and low toxicity. The preparation has excellent performance, which can be stored for two years without deposition and phenomenon of lamination. The invention has long life span of a goods shelf, and is not easily burnt and is safe to store and transport.

The present invention relates to an anti-dry burning device and anti-dry burning control method of electronic cigarettes. The anti-dry burning device of the electronic cigarettes comprises a microcontroller, a buck-boost bridge circuit, a mistorizer resistance value sampling circuit, a mistorizer, a mistorizer resistance value detection module and a battery power supply circuit; and the microcontroller is electrically connected with the buck-boost bridge circuit, the mistorizer resistance value sampling circuit, the mistorizer and the mistorizer resistance value detection module sequentially, and the mistorizer resistance value detection module is connected with the microcontroller; the mistorizer resistance value sampling circuit is electrically with the mistorizer resistance value detection module; a feedback circuit is connected between the mistorizer resistance value sampling circuit and the buck-boost bridge circuit, and the feedback circuit is connected with the microcontroller, and therefore, the microcontroller can adjust the output voltage of the buck-boost bridge circuit and keep the output voltage stable; and when an electronic cigarette is used, tobacco juice is almost exhausted, and the mistorizer resistance value detection module detects that the number of times when the resistance value of the mistorizer consecutively exceeds a dry burning protection set resistance value, exceeds a set number of times, the microcontroller instructs the buck-boost bridge circuit to turn off output, and the electronic cigarette automatically stops working.

The invention discloses an improved textile machine with a dust removal function, which comprises a machine frame, wherein a dust removal box is fixedly connected to the side wall at the upper end ofthe machine frame, a first filter screen and a second filter screen are symmetrically connected to the inner wall of the dust removal box in a sliding manner, and a shaking device for shaking the first filter screen and the second filter screen is mounted in the dust removal box. By the arrangement of a connecting rod which is connected to the inner wall of the dust removal box in a rotary manner,the rotation of the connecting rod enables bristles on the side wall of a transverse plate to clean the first filter screen, due to the arrangement of magnetic semi-discs and magnets, the first filter screen can reciprocate and shake when the connecting rod rotates, so that the cleaning of the first filter screen is accelerated; and by the arrangement of arc-shaped blocks attached to glass blocks, static electricity is generated by friction between the glass blocks and the arc-shaped blocks when the connecting rod rotates, and fine dust escaping from mesh holes of the first filter screen is cleaned, so that the fine dust is prevented from floating into the air to affect the working environment of workers and cause harm to the health of the workers.

The invention discloses a photoresist peeling solution composition with metal protection. The photoresist peeling solution composition consists of the following substances in percentage by weight: 0.1 to 10 percent of quaternary ammonium hydroxide, 5 to 30 percent of water-soluble alkanol amine, 55 to 94.4 percent of water-soluble organic polar solvent and 0.5 to 5 percent of sugar alcohol additive, wherein the water-soluble organic polar solvent is sulfone, sulfoxide, amide or lactam solvent. Compared with the conventional peeling solution composition, the photoresist peeling solution composition has excellent corrosion resistance to a metal-based coating covered by photoresist, particularly copper and aluminum at the same time of ensuring excellent photoresist peeling performance, and has excellent side corrosion protection effect on the copper. Meanwhile, the peeling solution composition has low volatility and low toxicity, is easily cleaned by using deionized water, and has good maneuverability. The composition is used for peeling and dissolving a photoresist mask in a semiconductor element manufacturing process.

The invention relates to a method for detecting the flow speed and the flow direction of groundwater by using the temperature as a tracer and a measuring device. The invention adopts a linear heat source, voltage is exerted on the linear heat source so that the linear heat source can generate the heat, a plurality of temperature probes are arranged on the same circumference around the heat source at equal intervals, the values and the time of the temperature received by each probe are different under the effect of the water flow, the temperature received by the probes at the downstream of the heat source is higher than that received by the probes at the upstream of the heat source, the values of the received temperature are used for judging the flow direction of the groundwater, the value of the flow speed of the groundwater is relevant with the time of temperature change received by the probes, and the value of the flow speed of the groundwater is calculated through the time duration from the electrification initiation to the measured temperature change.

A method and device for cleaning air. The air to be cleaned is directed as a continuous flow in succession through a) a first zone wherein the air is treated with ozone and possibly also water, ammonia or other aerosol growth promoters; b) a second zone wherein the air is subjected to ultraviolet light; c) a third zone wherein the air is maintained for a sufficient time to allow aerosol growth; d) a fourth zone where particles in the air are given an electrical charge; e) a fifth zone wherein the air is passed through an electrostatic filter; and f) a sixth zone wherein the air flows over a catalyst to break down residual ozone.

The invention provides a single-well underground water seepage flow velocity and flow direction measuring method and measuring instrument. The measuring instrument includes a controller and a seepage detector, the seepage detector includes a shell, an upper separator plate, an inclinometry integrated sensor, a pendulum bob and pressure sensors, the pendulum bob and the center of the upper separator plate are connected through a string, due to the function of water flow, a pendulum ball at the bottom of the pendulum bob is subjected to continuous seepage force, the seepage force is transited to the adjacent pressure sensor through a disc, at the same time, the inclinometry integrated sensor measures an inclination angle and an azimuth angle of the measuring instrument and azimuth angles of the pressure sensors, a gravity component of the pendulum bob at the moment can be known, and through vector calculation of force, the magnitude and direction of the seepage force can be judged and thus is indirectly converted into the flow velocity and flow direction of seepage. The measuring instrument has the characteristics of simple structure, low power consumption and the like, and the measuring method can be widely applied to seepage condition monitoring of underground buildings or rock and earth masses such as side slopes, underground diaphragm walls and dams.

The invention provides a lipopetide biosurfactant oil extraction agent for improving extraction rate of crude oil and relates to the technical field of microbial oil extraction. The lipopetide biosurfactant oil extraction agent is prepared by obtaining fermentation liquor after fermentation by lipopetide-biosurfactant-producing bacillus subtilis ACCC01430 and mixing the fermentation liquor and a nutrient solution according to a volume ratio of (3-5):1, wherein the nutrient solution comprises 1 percent of molasses, 1 percent of urea, 0.5 percent of peptone, 0.2 percent of yeast extract, 0.3 percent of ammonium monohydric phosphate and the balance of water; and the fermentation liquor is prepared by fermenting with bacillus subtilis ACCC01430 by a method specified in the description. According to the lipopetide biosurfactant oil extraction agent for improving extraction rate of crude oil, a large amount of lipopetide surfactant is produced by ground fermentation; the surfactant can emulsify crude oil, improve wettability of rocks, reduce oil-water interface tension and reduce viscosity of the crude oil; and the bacteria can reproduce and grow in oil layer at 50 DEG C. The nutrient solution can promote the growth of the bacteria and activate microbes to extract oil.

The invention discloses a manufacturing method of a food odor visible sensor based on natural pigment. The manufacturing method comprises the steps of: respectively adding 50-95% alcohol solution or 3-7% of citric acid solvent to black rice, azalea, peach flower and purple sweet potato raw materials, soaking in a 60-80 DEG C water bath pan, after obvious fading, filtering and concentrating to obtain four pigment concentrated solutions with water contents of 60-80%, adjusting the pH values of the four pigment solutions to 4, 5, 6, 7, 8 and 10 with water, 0.5-5% citric acid solution and 3-10% sodium bicarbonate solution respectively, detecting with a color difference meter and analyzing the color difference of each pigment under the conditions of different pH values by an LAB color space method, selecting the pigment with obvious AB value changes under the weak acid, neutral and weak basic conditions as a gas sensitive material, finally fixing the gas sensitive material to a substrate flat material, and drying to obtain a visible sensor array. According to the invention, the natural pigment is used as the gas sensitive material, thereby being nontoxic and harmless as well as eliminating the harm to human health.

The invention discloses a manufacturing method and a coating of a glass fiber fire blanket. A water-soluble mixed material is adopted to coat glass fiber base cloth in a dipping coating mode, so that a layer of dense fireproof coating is formed on the surface of the glass fiber base cloth, the surface of the coated glass fiber fire blanket is soft and airtight, flame can be isolated from fire, and thus the purpose of fire extinguishment is achieved. Meanwhile people escaping from fire can be protected by the glass fiber fire blanket as human bodies are prevented from damage caused by flame. When being used as a fireproof curtain, the glass fiber fire blanket can effectively prevent diffusion of flame, and has the characteristic of wide use range.

The invention discloses a preparation method for thermoset high temperature resistant methyl phenyl silicone resin, which relates to the technical field of resin preparation and comprises the steps of utilizing toluene or dimethylbenzene or mixed solution of the toluene and dimethylbenzene to serve as a solvent, utilizing methyl trichlorosilane, dichlorodimethylsilane and methylphenyldichloros as monomer raw materials, dropping mixed solution of acetone and water into the raw materials under the condition of ice-water bath, ensuring that the dropping is finished within 3-5 hours, obtaining a prepolymer of the methyl phenyl silicone resin, performing condensation and curing on the obtained prepolymer above 150 DEG C after pressure of the prepolymer is reduced and the prepolyme is concentrated, the adopted condensation catalyst is caprylate or naphthenate, particularly is stannous octoate, zinc isoocatanoate, cobalt naphthenate and dibutyltin dilaurate. The resin is semi-transparent hard or elastic solid, can not be dissolved or fused, and can be resistant to high temperature above 200 DEG C, and can be used as silicon rubber or a plastic filler.

The invention discloses a preparation method of a phosphorus-doped graphite phase carbon nitride nano film and belongs to the technical field of semiconductor nano materials. The preparation method comprises the following steps of: firstly, mixing a high molecular polymer 2,4-diamino-1,3,5-triazine with cyanuric acid to react to prepare a precursor of graphite phase carbon nitride; then putting the precursor on the surface of FTO glass and preparing a carbon nitride film by means of a high-temperature calcining method; and finally, putting the carbon nitride film in a magnetic boat and calcining the film in a nitrogen atmosphere by taking sodium hypophosphite as a phosphorus source to obtain the phosphorus-doped graphite phase carbon nitride nano film. By taking FTO conductive glass as a substrate material, the method disclosed by the invention is simple in preparation process and low in cost; the prepared phosphorus-doped graphite phase carbon nitride nano film is good in shape and high in purity, overcomes the defect that a phosphorus-doped graphite phase carbon nitride nano powder material is poor in dispersibility, and is high in photocatalytic activity; and no toxic and harmful substances are generated in the whole preparation process, the environment is not polluted, the human health is not damaged, and the preparation method is safe and environmental-friendly.

The present invention discloses one kind of water-based foamed ant repelling and killing spray and its preparation process. The spray is prepared with pyrethroid 0.2-0.5 wt%, foaming agent 5-15 wt%, foam stabilizer 0.5-2 wt%, cosolvent 5-20 wt%, water soluble adhesive polymer 0.1-1 wt%, preservative 0.1-0.5 wt% and water for the rest. Its preparation process includes the steps of: dissolving pyrethroid in the cosolvent to form organic solution A, dissolving the water soluble adhesive polymer and the preservative in water to form solution B, mixing the foam stabilizer separately with the solution A and the solution B, mixing the solution A and the solution B, canning and filling the foaming agent. The ant repelling and killing spray as one kind of active preparation has no toxic organic solvent, simple production process, high use safety, high ant killing effect, environment friendship and other advantages.

The invention relates to the field of veterinary drugs, and particularly relates to prevention and cure of three main parasitic diseases, namely a tapeworm disease, a roundworm disease and a coccidium disease, or the tapeworm and coccidium mixed infection and the roundworm and coccidium mixed infection of free-ranging chickens. The invention particularly discloses a traditional Chinese medicine composite for resisting the parasites of the free-ranging chickens and a preparation method thereof. The traditional Chinese medicine composite is prepared into a traditional Chinese medicine formulation by taking rangooncreeper fruits, aloes, liquorice, hawthorns, fructus carpesii, medicated leaven, fructus hordei germinatus, azedarach, rhizoma atractylodis, codonopsis pilosula, betel nuts, radix dichroae, cyrtomium fortunei, radix astragali and pericarpium citri reticulatae as crude drugs. The traditional Chinese medicine disclosed by the invention is used for treating the three main parasitic diseases, namely the tapeworm disease, the roundworm disease and the coccidium disease, or the tapeworm and coccidium mixed infection and the roundworm and coccidium mixed infection of the free-ranging chickens, enhances the feed conversion rate, strengthens the organism resistance action and has the advantages of outstanding effect, safety in use, no residue, difficulty in drug resistance generation, low price, and the like.

The invention discloses a composition containing exogenous mitochondrion as active ingredient, application thereof and a cell repairing method. The composition comprises exogenous mitochondria and at least one pharmaceutically acceptable carrier or carrier acceptable in beauty, and further comprises an adjuvant which is prepared from a group composed of serum, blood plasma, complement and combination of at least two of serum, blood plasma and complement. The exogenous mitochondria are obtained from cells by a centrifugal purification way. The composition is of high safety. The exogenous mitochondria are sent into cells completely as an effective dose of the composition is fed into an individuality, thereby achieving cell repairing and cell senescence controlling or preventing.

The invention belongs to the technical field of cat litter, and provides deodorant plant cat litter and a preparing method thereof. The deodorant plant cat litter is prepared from, by weight, 60-70 parts of soybean fibers, 25-35 parts of corn starch, 10-20 parts of sodium bicarbonate, 5-10 parts of zeolite, 4-6 parts of citric acid, 1-3 parts of sodium phenylpropionic acid, 3-7 parts of active carbon, 2-5 parts of ammonium persulfate, 2-4 parts of guar gum, 1-5 parts of a garlic extract, 1-3 parts of tea residues and 0.5-1 part of polyethyleneimine. By means of the deodorant plant cat litter and the preparing method thereof, the technical problem that cat litter in the prior art is poor in antibacterial deodorant effect is solved.

The invention provides a method utilizing industrial waste to prepare a non-asbestos calcium silicate board. The method includes the following steps: (1) producing waste concrete paper bag sizing agent; (2) dosing: 6%-10% of the waste concrete paper bag sizing agent, 35%-45% of quartz tailing mineral powder, 2%-8% of calcium carbide slurry, 4%-10% of wollastonite powder, 1%-5% of mica powder, 15%-25% of concrete, 5%-10% of slaked lime powder, 5%-10% of sanding powder, and 0.05%-0.1% of poly-acetamide; (3) pulping; (4) after starching by a pulp flowing machine, producing by a board-making machine board, cutting by a cutting machine board, steaming by a still kettle, drying by a drying machine, grind edging by an edge grinding machine, and sanding by a sander, the non-asbestos calcium silicate board is obtained. Due to the fact that the waste concrete paper bags, the quartz tailing mineral powder, the calcium carbide slurry and the like are used for raw materials for preparing the non-asbestos calcium silicate board, the method utilizing industrial waste to prepare the non-asbestos calcium silicate board not only is beneficial for saving natural resources such as raw ore and wood, but also is beneficial for reducing pollution from the waste to environment. Besides, the prepared products are low in cost, safe, and environmental friendly.

The invention relates to a poplar catkin and willow catkin automatic collection device, and belongs to the technical field of cleaning machinery. According to the device, the poplar catkin and willowcatkin automatic collection device is controlled through a driver's cab, the water in a water tank is pumped into a cleaning water pipeline by a high-pressure pump during the walking process of the device, the cleaning water is atomized and sprayed by an atomizing device, and mist is combined with poplar catkins and willow catkins floating in the air, so that the poplar catkins and the willow catkins are settled onto the ground, a cleaning brush is extended by a rocker arm arranged below a machine frame, the settled and the dropped poplar catkins and willow catkins are swept and gathered, thegathered poplar catkins and willow catkins are sucked into a collection box through an air suction pipeline by a ground brush suction mouth under the action of pressure, larger impurities are filtered, after the poplar catkins and the willow catkins enter into the collection box, the water is pumped into a spraying nozzle by the high-pressure pump, the water is sprayed into the collection box by the spraying nozzle to settle the poplar catkins and the willow catkins to a filtering plate at the bottom of the collection box, and the water is filtered by the filtering plate and the water flows back to the water tank. By means of the device, the poplar catkins and the willow catkins in the air can be effectively cleaned to prevent the floated poplar catkins and willow catkins from harming thehealth of pedestrians.

The invention discloses a water-based antiseptic insulating paint, which comprises a substratum layer, an intermediate layer and a face layer, the formulation, process for preparation and use are provided for each layer of the paint. The paint has good antiseptic and heat insulation effects.

A chair lift including scissors pivotally mounted to a carriage and a lifting device pivotally positioned within the carriage. The lifting device closes the scissors and lifts the chair as desired.

The invention belongs to the technical field of microbial research and development, and discloses a microbial culture medium preparation device which comprises a preparation tank, a culture medium bag and a controller case, wherein the preparation tank is provided with a feed pipe and a discharge pipe; the culture medium bag is provided with a water inlet pipe and a water outlet pipe; the water inlet pipe of the culture medium bag is connected with a water source; a water inlet end of the culture medium bag is provided with a water inlet filter; the water outlet pipe of the culture medium bag is connected to the feed pipe of the preparation tank; a heating unit and a control unit are arranged in the controller case; the heating unit is used for heating the preparation tank; a temperature sensor is arranged in the preparation tank and connected to the control unit; the control unit is used for adjusting the temperature of the culture medium solution in the preparation tank in real time according to the feedback of the temperature sensor; and a stirrer is arranged in the preparation tank. By using the newly designed preparation device and preparation method, the culture medium can implement less nutrient destroy and less manual intervention, and can quickly implement preparation of the larger-volume culture medium.

The invention discloses a softener for producing regenerated rubber and belongs to the technical field of softeners. The softener takes swill-cooked dirty oil as a raw material, wherein the swill-cooked dirty oil contains main components in percentage by weight as follows: 20-30 percent of animal and plant oleic acid, 15-25 percent of arachidonic acid, 8-15 percent of stearic acid and 15-25 percent of glycerol. The swill-cooked dirty oil is prepared into the softener for producing the regenerated rubber through work procedures of filtering, removing water, deodorizing and adding a reinforcing agent. The softener disclosed by the invention has the advantages of wide raw material sources, low cost and simple treatment process; and the softener can be used for producing environment-friendly regenerated rubber, provides a new path for recycling and innocent treatment and can effectively prevent the swill-cooked dirty oil from reflowing to dinning tables and harming the human health.

The invention provides a rapid determination method of fatty acid and squalene in plant oil. The method comprises the following steps of: adding n-hexane in the plant oil according to 35-50mL / g of plant oil to fully dissolve the plant oil; adding a mixed solution of potassium hydroxide and methanol according to 5.5-7.5mL / g of plant oil, oscillating for 3-5 minutes, and carrying out centrifugal separation for 5-8 minutes to obtain an upper sampling solution, wherein the concentration of the mixed solution is 2mol / L; and carrying out GC (gas chromatography) and MS (mass spectrum) analysis in a gas supply phase chromatographic instrument, and calculating according to a conventional area normalization method to obtain the components of the fatty acid and the percentage composition of the functional ingredient squalene. The extraction of sample fatty acid and the methyl esterification of the fatty acid are accomplished synchronously, and at the same time, squalene is extracted in a solvent well, so that the method is rapid, simple and less in solvent amount, and has no harm to human health, therefore, the lower detection limit is realized. The method is applicable to the detection of fatty acid and squalene contents in any plant oil.

The invention relates to an automatic polishing device and a polishing system thereof. The automatic polishing device comprises a workpiece positioning mechanism, a conveying line, a feed mechanism, adischarge mechanism, a polishing mechanism, a sandpaper replacing mechanism, a manipulator control cabinet, an electric control cabinet and a dust cover. The automatic polishing device has the functions of positioning, polishing and sandpaper replacement, and a manipulator and a polishing head group are controlled by a PLC (Programmable Logic Controller) control system, so that automatic polishing can be completed even in the conditions of large workpiece error ratio and large workpiece deformation, the polishing efficiency and the product polishing quality are increased, and manual polishingis replaced, so that human health cannot be harmed by dust.

The invention discloses a concrete mixing device with an automatic cement feeding function. The concrete mixing device comprises a mixing box, a mixing cavity with a leftward opening and a rightward opening is formed in the mixing box, a concrete mixing device body is arranged in the mixing cavity, the concrete mixing device body is used for stirring and mixing a concrete raw material, a turnoverconveying device is arranged at the opening in the right side of the mixing cavity, the turnover conveying device conveys cement bags into the mixing cavity through rotary motion and can convey the cement bags from which cement is thoroughly discharged to the outside for storage, a cement bag clamping device located on the left side of the concrete mixing device body is arranged in the mixing cavity, the cement bag clamping device is used for clamping and fixing the cement bags, and a vibration screening device located on the left lower side of the turnover conveying device is arranged in themixing cavity. According to the concrete mixing device with the automatic cement feeding function, automatic feeding of cement powder can be achieved, dust generated in the feeding process is greatlyreduced, and harm to the health of workers is avoided.

The invention discloses an energy-saving and environmentally friendly composite floor and a manufacturing method of the energy-saving and environmentally friendly composite floor. The purpose is to provide the energy-saving and environmentally friendly composite floor which is cheap, convenient to manufacture, few in consumed raw wood, beautiful in appearance, good in quality and high in production efficiency. The energy-saving and environmentally friendly composite floor comprises a panel and a bottom plate, wherein the panel and the bottom plate are made of wood veneers and arranged on the upper surface and the lower surface of the floor respectively. A core plate is arranged between the panel and the bottom plate in a sandwiched mode. The composite floor is characterized in that the core plate is made of polyurethane foaming materials. Tongue-and-grooves or tenons are formed in the side faces around the floor and spliced mutually. The composite floor can effectively block water and moisture and has a moisture-proof effect and effects of heat preservation and heat insulation, when an air conditioner is turned on in summer or in winter, indoor temperature can be effectively kept, heat exchanging is reduced, and energy is saved. Particularly, woods are greatly saved, and the composite floor plays an obvious role in protecting forest resources and the ecological environment. The possibility that formaldehyde is contained in adhesive, and therefore the health is harmed is also avoided. The composite floor is a novel floor which is really green, safe and environmentally friendly and saves the energy.