35results about How to "Strong Antibacterial" patented technology

The invention provides antibacterial hydrocolloid dressing and a preparation method thereof, and belongs to the technical field of medical dressing. The preparation method of the antibacterial hydrocolloid dressing is as follows: firstly, elastomers, tackifying resin, a plasticizer and an antioxidant are added into an internal mixer and mixed to prepare a hot-melt pressure-sensitive adhesive; hydrocolloid particles, polyvinyl alcohol, chitosan derivative and an antibacterial agent are added into the hot-melt pressure-sensitive adhesive and mixed; and the mixture is placed in a press vulcanizer for treatment, a waterproof polyurethane backing is coated with the treated mixture, release paper is covered, and a finished product is prepared after irradiation sterilization. The anti-bacterial hydrocolloid dressing prepared with the method has good antibacterial performance and has no safety risk; and the polyvinyl alcohol ingredient added in the preparation process is crosslinked during irradiation to form physical gel, the integrity of the dressing is effectively maintained, and the corrosion resistance of the dressing is improved.

The invention discloses bacillus subtilis JYM841 with antibacterial activity. The bacillus subtilis is preserved in a China center for type culture collection in January 10, 2014, and the preservation number is CCTCC NO: M 2014012. The bacillus subtilis JYM841 has a strong inhibitory effect on staphylococcus aureus and candida albicans, is high in antibacterial activity, wide in antibacterial spectrum, high in enzyme production, sensitive to bacterial antibiotic, drug-resistant to fungal antibiotic, high in heat-resisting ability and tolerant to acid and alkaline, has high antibacterial activity after treated at the temperature of 100 DEG C for 20min, and has tolerance to various enzymes such as trypsin, papain and protease K. An acid and alkali resistant pH (potential of hydrogen) value ranges from 6 to 10, and metabolite is stable, so that the bacillus subtilis can be applied to preparation of medicines for treating genital tract infection.

The present invention is process of preparing active peptide antagonizing pathogenic bacteria of fruits and vegetable. The active peptide with feature of antagonizing pathogenic bacteria is used to replace chemical bactericide for biological disease control of picked fruits and vegetable. It is targeted to penicillium and gray mold, and is prepared through directionally enzymolyzing oyster with Alcalase 2.4L and bromelin and separation purifying. It has obvious in vitro antibacterial action on penicillium and gray mold, say, of nectarine. The natural antiseptic has low cost and high safety, and is suitable for industrial production.

The invention discloses an environmental-protection oxygen barrier antibacterial polypropylene-random (PP-R) pipe. The environmental-protection oxygen barrier antibacterial PP-R pipe comprises a PP-R outer layer, a PP-R oxygen barrier intermediate layer and a PP-R antibacterial inner layer, wherein a high-performance oxygen barrier agent selected in the PP-R oxygen barrier intermediate layer is polyamide and copolymers thereof or polyving akohol and copolymers thereof. The environmental-protection oxygen barrier antibacterial PP-R pipe has a reasonable production formula and low production cost, keeps inherent physical and mechanical properties by adding the oxygen barrier intermediate layer and performing one-time extrusion molding, has high oxygen barrier performance and can prolong the service life of system equipment. The environmental-protection oxygen barrier antibacterial PP-R pipe has an antibacterial rate up to 90 percent on escherichia coli and staphylococcus aureus and has high physical and mechanical properties.

The invention discloses a preparation method of a PE antibiotic food preservation film. The preparation method comprises the following steps: (1) granulating antibiotic master batch; (2) film blowing. The preparation method has the advantage of simple technology, and the properties of the prepared preservation film such as color ability, antibiotic property, physical and mechanical property, and anti-aging property all meet the corresponding standards.

The invention discloses a method for preparing an antibacterial material by use of nano silver, and relates to a preparation method of the antibacterial material. The preparation method comprises the following steps: (1) adding a prepared 2.5g / L nitrate solution into a formaldehyde solution added with 10% of a reducing agent, adding catalyst organic base triethylamine and protective agent thiosalicylic acid for mixing for reaction; (2) adding excess triethylamine into the reacted solution of the step (1) to make the solution more stable and obtain a nano silver solution with the nano silver average particle size being less than 10nm; (3) preparing a 2-3g / L nano silver mixed solution, using a sprayer to spray onto a medical fabric, and drying; (4) filling the medical fabric sprayed with the nano silver with absorbent cotton to make the bactericidal effect better. The nano silver medical product prepared by the method has strong antibacterial, bactericidal effect and broad spectrum antibacterial activity, and is free of drug resistance and high in safety, and the bactericidal effect is greatly enhanced.

The invention relates to the technical field of traditional Chinese medicine preparation, and in particular relates to a traditional Chinese medicine composite gel agent for treating trauma as well as a preparation method and application of the traditional Chinese medicine composite gel agent. The traditional Chinese medicine composite gel agent for treating trauma, which is provided by the invention, is prepared from a traditional Chinese medicine extract of 7 raw material medicines, namely moghania macrophylla, angelica sinensis, astragalus membranaceus, cacumen biotae, cape jasmine, sanguisorba officinalis and mint, and has the effects of clearing heat and removing toxin, cooling blood and removing stasis, removing swelling and relieving pain and stopping bleeding and generating muscle. Meanwhile, the traditional Chinese medicine composite gel agent for treating trauma, which is provided by the invention, is good in antibacterial property, rapid in pain stopping, good in treatment effect, short in treatment course, free of toxic or side effect, free of scar after treatment, high in treatment rate, and can be widely applied to aspects such as burning and scald, infectious trauma and bedsore.

The invention discloses a martensite stainless steel with high hardness, strong antibacterial property and excellent corrosion resistance, and a heat treatment method thereof, and belongs to the technical field of stainless steel materials. The chemical components of the stainless steel comprise 0.28-0.35wt% of C, 1.00wt% or less of Si, 1.00wt% or less of Mn, 0.040wt% or less of P, 0.030wt% or less of S, 12.00-14.00wt% of Cr,2.5-3.5wt% of Cu, 0.5-1.0wt% of Mo, 0.02-0.08wt% of N, and the balance of Fe. A copper-rich phase uniformly and dispersively precipitates in a stainless steel matrix after the special heat treatment of the stainless steel in order to make the stainless steel have an antibacterial property and maintain the high hardness of the martensitic stainless steel. The stainless steel has a wide spectrum antibacterial property and good mechanical properties, and can be widely used in the fields of medical devices, sanitary devices, kitchen knives and cutting tools and the like.

The invention discloses an anti-ultraviolet and antibacterial fiber. The anti-ultraviolet and antibacterial fiber is composed of an ultraviolet screening agent, poly(1,4-Phenylenediacetate diethyl ester), silver antibacterial master batches, polyester fiber resin and a stabilizer, wherein the anti-ultraviolet and antibacterial fiber comprises the following components in parts by weight: 1-7 parts of ultraviolet screening agent, 8-15 parts of polyethylene terephthalate, 10-15 parts of silver antibacterial master batches, 70-80 parts of polyester fiber resin and 5-10 parts of stabilizer. The anti-ultraviolet and antibacterial fiber disclosed by the invention has an efficient antibacterial effect and an obvious anti-ultraviolet effect, the antibacterial effects on staphylococcus aureus, Escherichia coli and Candida albicans respectively reach 98%, 95% and 86%, the UPF (Ultraviolet Protection Factor) average value is 50 and the solar ultraviolet transmittance is 0.462%, so that the anti-ultraviolet and antibacterial fiber completely meets the requirements of national ultraviolet protection standards.

The invention discloses an antibacterial and degradable plastic packaging bag for marinated foods. The antibacterial and degradable plastic packaging bag is prepared by the following materials in parts by weight: 100 parts of low-density polyethylene, 20-25 parts of polybutylene succinate, 2-6 parts of polyvinyl alcohol, 2-6 parts of polyhydroxyalkanoate, 1-3 parts of polylactic acid, 1-3 parts of polymethyl ethylene carbonate, 2.4-2.6 parts of nano zinc oxide, 6-8 parts of clove essential oil, 1.2-1.5 parts of potassium sorbate, 2-3 parts of shell powder, 1-2 parts of bacterial cellulose, 11-13 parts of enteromorpha fibers, 2-3 parts of konjak sol, 1-2 parts of castor oil, 2-3 parts of silicon oxide and 1-2 parts of dioctyl maleate. The antibacterial and degradable plastic packaging bag disclosed by the invention has the advantages that the low-density polyethylene is adopted as a base material, nano zinc oxide treated by the konjak sol is adopted as a photocatalytic antibacterial agent, so that the antibacterial and degradable plastic packaging bag still has stronger antibacterial property and high antibacterial even though broad-spectrum property even under the condition of no light; and simultaneously the modified shell powder is used as a filler, so that the adsorbability is strong and the prepared antibacterial plastic packaging bag for the foods is environmentally friendly and degradable.

The invention discloses an antibacterial plastic, which is composed of, by weight: 40-60 parts of a plastic body, 10-15 parts of a plasticizer, 10-15 parts of a stabilizer, and 20-40 parts of an antibacterial agent. The antibacterial plastic provided by the invention has potent and lasting antibacterial and bacteriostatic effects, can reach an antibacterial ratio up to 90% on Escherichia coli and Staphylococcus aureus, and the antibacterial time is long. With a low pipe production cost, the antibacterial plastic can be widely used in refrigerators, washing machines, televisions and other household appliance industries.

Improved antibacterial plastic is prepared from, by mass, 40-50 parts of plastic body, 7-12 parts of plasticizer, 6-12 parts of stabilizer, 40-45 parts of antibacterial agent, 2-4 parts of silicon carbide and 1-2 parts of graphite powder. The plasticizer is the mixture of dioctyl phthalate and tributyl citrate, the stabilizer is a composite lead salt stabilizer, and the antibacterial agent is the mixture of zinc oxide, copper oxide and lithium carbonate. By the adoption of the inorganic antibacterial agent, bacterial inhibition and resistance can be achieved effectively, the antibacterial rate can reach 80% for certain bacteria, and the effect is durable. Meanwhile, high-strength silicon carbide is mixed in the plastic, so that high temperature resistance is high. Pipes made of the antibacterial plastic can be directly used in a heat supply system.

The invention discloses antirust oil and a preparation method thereof, and relates to the technical field of metal rust prevention, wherein the antirust oil comprises, by weight, 5-10 parts of dodecenylsuccinic acid, 50-60 parts of barium petroleum sulfonate, 15-30 parts of triethanolamine, 150-200 parts of engine oil, 45-60 parts of palmitic acid, 10-20 parts of 4-methylbenzotriazole, 30-50 partsof sodium dodecyl benzene sulfonate, 45-60 parts of a buffer solution, and 600-700 parts of water. According to the invention, the anti-rust oil prepared by the formula has advantages of good anti-rust performance and low use cost.

The invention relates to a preparation method and application of atractylodes lancea volatile oil microcapsules. The preparation method comprises the following steps: (1) fusing and homogenizing raw materials; (2) carrying out ultrasonic emulsification and clathration; and (3) drying, and carrying out microencapsulation molding. The preparation method has a simple preparation process, the grain diameter of the microcapsules is controllable, and the obtained microcapsules have regular shapes and high embedding rate, is good in water solubility, and have good antibacterial and bactericidal effects.

The invention discloses an anti-impact antimicrobial food packaging material, which is prepared from the following raw materials in parts by weight: 100 parts of low-density polyethylene, 10 to 12 parts of polystyrene, 3.6 to 3.8 parts of nanometer zinc oxide, 6.6 to 6.8 parts of purple perilla essential oil, 0.5 to 0.7 part of sodium dodecyl benzene sulfonate, 4 to 5 parts of medical stone, 1 to 2 parts of tallow, 7.6 to 7.8 parts of butylparaben, 9 to 11 parts of short carbon fiber, 3 to 5 parts of pig skin gelatin and a proper amount of water, wherein the low-density polyethylene is used as a base material; the nanometer zinc oxide subjected to activating treatment is used as a photocatalysis antibacterial agent; the purple perilla essential oil is compounded; even under the nonluminous condition, high antibacterial property is also realized; the antibacterial broad spectrum activity is high; meanwhile, the modified medical stone is used as filler; the anti-impact performance and intensity of the material are improved; the prepared antibacterial food packaging material can improve anti-impact performance and high temperature resistant performance of food.

The invention discloses improved antibacterial plastic. The improved antibacterial plastic comprises, by mass, 35-50 parts of a plastic main body, 5-12 parts of a plasticizer, 4-12 parts of a stabilizer and 35-45 parts of an antibacterial agent. The plasticizer is a mixture of dioctyl phthalate and tributyl citrate. The stabilizer is a composite lead salt stabilizer. The antimicrobial agent is a mixture of ammonium dihydrogen phosphate and lithium carbonate. The novel antibacterial plastic has the advantages of use of an inorganic antibacterial agent, high antibacterial activity, antibacterial rate of 80%, and lasting effects.

The invention belongs to the technical field of vegetable sterilization, and discloses a specific biological sterilization preparation DY-6 for bean sprout anthracnose. The biological sterilization preparation DY-6 is prepared from carboxymethyl chitosan, deacetylated chitosan and sodium benzoate, wherein the mass ratio of carboxymethyl chitosan to chitosan to sodium benzoate is (1 to 5) to (5 to12) to (15 to 24). The biological sterilization preparation can significantly inhibit mycelial growth and spore germination of the bean sprout anthracnose, is suitable for controlling the bean sproutanthracnose in the bean sprout production, and has the advantages that the safety is high and no pesticide residues is generated compared with sterilizing agents such as carbendazim and chlorothalonilcommonly used in the market, and the food safety and good quality of bean sprouts are ensured.

The invention discloses an environment-friendly high-temperature-resistant cutting fluid. The cutting fluid is prepared from, by mass, 30-45 parts of hydrotreated base oil, 9-16 parts of anti-wear reagent at extreme pressure, 15-20 parts of diethanol amine, 0.5-1 part of anti-rusting agent, 10-12 parts of boric acid, 18-22 parts of oleamide, 12-19 parts of lauryl sodium sulfate, 3-8 parts of ethylene glycol, 20-28 parts of polyoxyethylene octylphenol ether, 1-3 parts of emulsification adjustment agent, 1-4 parts of dicarboximide, 2-5 parts of polydimethylsiloxane and 95-130 parts of water. The invention further discloses a preparation method of the environment-friendly high-temperature-resistant cutting fluid. The cutting fluid has no bad influence on a lathe, and all indexes of the cutting fluid are superior to those of saponified oil; meanwhile, the cutting fluid has good cooling, cleaning and anti-rusting properties, is nonpoisonous, odorless and nonerosive to human bodies, does not corrode equipment and does not pollute the environmen.

The application relates to a hemostyptic microsphere containing an antibacterial ingredient berberine as well as a preparation method and application of the hemostyptic microsphere, and a hemostatic agent can be used in human bodies and can be quickly degraded and absorbed. According to the invention, a composite antibacterial hemostyptic microsphere material taking sodium alginate, sodium carboxymethylcellulose, gelatin and the berberine as raw materials is adopted, the characteristics of bacteria resistance and adhesion of the berberine are utilized, so that the material is endowed with an antibacterial property, and a hemostyptic effect of the material is further enhanced. Meanwhile, in a simulated body fluid environment after hemostasis, hemostyptic antibacterial effective ingredientsincluding the sodium alginate, the sodium carboxymethylcellulose, the gelatin and the berberine are degraded, so that an effect that the hemostyptic material can be quickly degraded and absorbed in human bodies is achieved.

The invention discloses a production process of insect-resistant fabrics. The production process comprises the following steps of A, preparing yarns for spinning the insect-resistant fabric, and allocating the yarns in accordance with an allocation proportion; B, pretreating the yarns for spinning the fabric; C, dyeing the spun fabric, and performing high-temperature treatment on the dyed fabric;D, firstly finishing the dyed fabric to remove redundant yarns on the fabric; and E, cleaning after treating the surface of the fabric, and drying the cleaned cloth. The insect-resistant fabric prepared by the production process disclosed by the invention is strong in antibacterial property, and can maintain good antibacterial property after being repeatedly washed; and through an insect-resistantmaterial adopted in a formula, the fabric has good insect-resistant effect, and is not only good in hand feeling, but also environment-friendly and insect-resistant.

The invention relates to the technical field of nano material preparation methods, and discloses a preparation process of the nano-reinforced anti-pollution material for a cabinet panel. The nano zincoxide is added into a cabinet panel material; the surface of the nano-zinc oxide has relatively strong activation energy; under a natural state, a chemical reaction can be induced by ultraviolet rays; therefore, the surface has stronger anti-fouling and antibacterial capabilities; according to the invention, nano titanium oxide and nano porous silicon oxide are added; the nano titanium oxide andthe nano porous silicon oxide have relatively strong antibacterial, self-cleaning and anti-aging properties; harmful bacteria on the surface of the cabinet panel can be effectively killed; the antibacterial capacity of the panel fabric is improved, the nano-hydroxyapatite is added to serve as a carrier of the composite antibacterial agent, good compatibility with a resin matrix is achieved, the stability of the material is improved, the service life is prolonged, and the problem that in the traditional technology, metal particles fall off along with the increase of the service cycle, and consequently the environment and the human body are harmed is solved.

The invention discloses a spatula having a sterilizing function and applicable to pain-relieving and inflammation-diminishing ointments. The spatula comprises a spatula head, an elastic steel disc and a spatula shank, wherein the spatula head is approximately elliptical; blades at four sides of the spatula head are blunt and have a radian; a lower end of the elastic steel disc is vertically welded on a right side end face of the spatula head, while an upper end of the elastic steel disc is vertically welded on a left side end face of the spatula shank; a round through hole is formed in a right side end of the spatula shank; outside surfaces of the spatula head, the elastic steel disc and the spatula shank are coated with a nano-silver coating of which the thickness is 0.5-5mu m; and the spatula head, the elastic steel disc and the spatula shank are made of stainless steel. The spatula is rigid and can not be broken when used to mix an ointment; in addition, the spatula is elastic and has a radian, and thus is convenient to evenly spread the ointment; and moreover, the spatula has the sterilizing function, and can effectively avoid pollution and even skin infection caused by the adhering ointment residue going bad and moldy.

The invention discloses a medicament for treating barbiers and belongs to the field of drugs. The medicament is used for achieving the purposes of reducing corrosion and increasing the cure rate of barbiers. The medicament comprises the following medicinal raw materials by weight: 30g of agastache rugosus, 12g of alum, 15g of table salt and 1000g of rice vinegar. Agastache rugosus is ground into powder; alum is powdered, and the concentration of the rice vinegar is 5%. The invention further provides application of the medicament; the powder is firstly added in 1000g of rice vinegar and soaked for one week on an airtight condition; in use, the liquor medicine is taken to soak feet twice, each time lasts 30 minutes, and a course of treatment lasts for 5 days. Agastache rugosus, alum and table salt in the medicament have effects of detoxifying, killing intestinal worms, moisturizing skin and relieving itching; and alum and rice vinegar have strong antibacterial property. The main ingredients of the medicament are traditional Chinese medicine materials, so that the medicament is free of corrosion and harm to skin, and has extremely high cure rate of barbiers.

The invention relates to a device and a method for preparing a silver-plated non-woven fabric. The preparation device comprises an internal vacuum chamber, an evaporator used for silver atom evaporation is arranged in the internal vacuum chamber, a silver atom steam nozzle is formed in the internal vacuum chamber, and a large-diameter refrigerant roller, a large-diameter unwinding shaft and a winding shaft are further arranged outside the internal vacuum chamber. The large-diameter unwinding shaft and the winding shaft are located on the two sides of the large-diameter refrigerant roller, the height of the large-diameter unwinding shaft and the height of the winding shaft are larger than the height of the large-diameter refrigerant roller, and the large-diameter refrigerant roller is located at a silver atom steam nozzle of the vacuum chamber. According to the preparation device and method of the silver-plated non-woven fabric, silver atoms can be firmly and uniformly plated on the non-woven fabric.

The invention provides an antibacterial, mildew-proof and deodorizing composite film, which comprises a substrate, on which a layer of antibacterial film is compounded; the antibacterial film is composed of antibacterial agent and plastic, and the content of antibacterial agent is 0.1-10wt%; In parts by weight, the antibacterial agent consists of 1-10 parts of salicylanilide and 1-10 parts of imidazole. After the antimicrobial agent and plastic particles are evenly stirred, they are fed into a screw extruder and melted and extruded; the melt is cast into a film, and then hot pressed and pasted on the substrate to form a composite film. The composite membrane provided by the invention is safe and reliable, and the antibacterial agent can be used for acute oral LD 50 >10000mg / kg (rat); strong antibacterial properties, especially in high humidity environment; stable performance, very stable in acid-base solution and ultraviolet rays, non-corrosive container, slightly soluble in water, medicine Long-lasting effect; transparency has no effect.

The invention relates to the field of pharmaceuticals and particularly relates to a preparation method of eye drops. The preparation method comprises the following step: soaking raw material pedicularis verticillata in a sodium chloride isotonic solution for treatment, wherein when the osmotic pressure of the sodium chloride solution is equal to that of cells of pedicularis verticillata, the osmotic pressures inside and outside the cells are balanced, matter exchange is avoided, and component loss is avoided; the active components are fully extracted, a phenylpropanoid glycoside compound is extracted therefrom, so that on one hand, the eye drops have relatively strong antibacterial and anti-inflammatory activities, achieve the effect of transcriptional activation of tissue inflammation genes, and are capable of alleviating inflammation of eyes; on the other hand, the eye drops also contain antioxidant active matters for alleviating fatigue, so that muscle contraction caused by fatiguecan be alleviated, and the eye drops play roles of preventing fatigue and protecting eyeballs.

The invention discloses Chinese herbal medicine toothpaste containing eugenia caryophyllata thunb and alpinia oxyphylla volatile oil and a preparation method of the Chinese herbal medicine toothpaste,and belongs to the field of daily chemical products. The Chinese herbal medicine toothpaste comprises the following components of 1.5-2 parts of an eugenia caryophyllata thunb volatile oil and alpinia oxyphylla volatile oil compound, 30-50 parts of an abrasive, 21-33 parts of a humectant, 4-6 parts of xylitol, 1.5-5.5 parts of a thickener, 1-2 parts of sodium dodecyl sulfate and 16-20 parts of water. Through the powerful antibacterial and bactericidal effects of the eugenia caryophyllata thunb volatile oil and alpinia oxyphylla volatile oil compound, tooth bacteria breeding is inhibited, powerful protection is provided for the teeth, meanwhile, certain analgesia and halitosis removal effects are achieved, tooth health can be effectively protected, and dental caries is prevented.

The invention mainly relates to the technical field of ceramic machining and discloses a wearproof antibacterial tile. The tile is prepared from 41-43 parts of dolomite, 37-39 parts of barite, 37-39 parts of reclaimed ceramic materials, 31-33 parts of limestone, 31-33 parts of potassium feldspar, 26-28 parts of wollastonite, 25-27 parts of modified serpentine, 22-24 parts of talc and 13-15 parts of ettringite. The provided wearproof antibacterial tile is high in abrasion resistance, excellent in antibacterial property, fine and smooth in the surface, capable of effectively preventing scratches, mildew and discoloration and easy to clean. The dolomite, the barite, the reclaimed ceramic materials, the limestone, the potassium feldspar, the wollastonite, the modified serpentine, the talc andthe ettringite are separately subjected to primary smashing, the resources of each raw material are wide, the cost of the tile can be reduced, matching is appropriate, and the strength and wearing resistance of the tile can be enhanced.

The invention discloses a preparation method of natural plant source food preservative based on roof iris rhizomes.The natural plant source food preservative contains roof iris rhizome extract.A preparation method of the roof iris rhizome extract comprises the following steps of 1, mixing dry roof iris rhizomes with radix polygoni multiflori, conducting pulverization, conducting heat reflux extraction with ethanol with the concentration being 65-75%, combining extracting solutions, and concentrating the mixture till no alcohol smell exists, so that a concentrated solution is obtained; 2, sequentially conducting extraction on the concentrated solution obtained in step 1 with petroleum ether, ethyl acetate and water-saturated normal butanol, so that petroleum ether extract, ethyl acetate extract and normal butanol extract are obtained separately; 3, enriching the normal butanol extract with macroporous resin, firstly washing 8-10 column volumes with ethanol with the concentration being 6-10% to remove high-polarity constituents, then eluting 9-13 column volumes with ethanol with the concentration being 65-75%, collecting ethanol eluant with the concentration being 65-75%, and conducting pressure-reduced concentration, wherein radix polygoni multiflori accounts for 5-15% the total weight of roof iris rhizomes and radix polygoni multiflori.

The invention discloses biological pesticide and a preparation method thereof. The biological pesticide is prepared by taking mugwort, pumpkin stem and leaf, herba menthae, corn straw and corncob as raw materials and fermenting through bacillus amyloliquefaciens. The weight ratio of each component in the raw materials is as follows based on the total weight of the raw materials: 55 to 65 percent of the corn straw, 25 to 30 percent of the corncob, 2.5 to 5 percent of the mugwort, 5 to 10 percent of the pumpkin stem and leaf and 2.5 to 5 percent of the herba menthae. By adopting the biological pesticide disclosed by the invention, the disadvantages of existing biological pesticide are overcome and the biological pesticide can be used for preventing and controlling diseases and insect pests of various crops and is easy to biologically degrade; the biological pesticide has no residues in the harvested crops; and when the biological pesticide is used as pesticide, the biological pesticide also has the effect of fertilizer and can be used for increasing the production of the crops.