NOVELTY - Composite of antibacterial and biological organic liquid fertilizer comprises (in wt.%): (A) Bacillus subtilis (15-20), (B) Pseudomonas fluorescence (10-15), (C) Streptomyces antibioticus (15-20), (D) Trichoderma harzianum (10-20) and (E) chitin (30-50), where the total content of the fertilizer is 100%.    USE - The composite of antibacterial and biological organic liquid fertilizer is useful for preventing and killing pathogenic bacteria, decomposing agriculture residues, dissolving insoluble phosphorus salts, decomposing straw rough fiber and accelerating growth of the crops.    ADVANTAGE - The product reduces the demand of chemical pesticide, and improves quality of soil and hence widely applied to crops.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the antibacterial composite biological organic liquid fertilizer, which involves (i) purifying each strain of A, B, C and D in laboratory and processing the culture by adding the strains into 1 l of culture medium, (ii) adding the processed culture into a seed pot of 50 l, (iii) obtaining a reaction pot to manufacture large amount of aseptic culture medium, (iv) proliferating the strains by maintaining certain oxygen supply, agitating the culture medium and regulating the temperature conditions for 5-10 days, and (v) pouring the strains cultured by xenic culture into a mixing container, adding high-temperature sterilized culture medium (15-25 wt.%) to the container, adjusting the pH to 6.5-7 and controlling the temperature at 25-30 degrees C with uniform agitation and oxygen supply, adding the strain E to the obtained mixture, supplying gas and agitating uniformly and pouring the mixture into a storing tank after 60-72 hours and packaging the obtained product. The culture medium is xenic culture medium for culturing B.subtilis and P.fluorescence. The xenic culture medium comprises (in %): amino acid (0.2-0.4), potassium phosphate (0.8-1.2), carbamide (0.8-1.2), sodium chloride (0.3-0.5), magnesium sulfate (0.01-0.03), ferrous sulfate (0.01-0.02), calcium carbonate (0.15-0.25) and molasses (0.08-0.12). The culture medium for S.antibioticus comprises soluble starch (0.8-1.2), amino acid (0.2-0.4), potassium phosphate (0.08-0.12), potassium nitrate (0.08-0.12), sodium chloride (0.04-0.06),magnesium sulfate (0.04-0.06), ferrous sulfate (0.001-0.002) and molasses (1.2-1.8). The pH value is 7.0-7.5. The culture medium for T.harzianum comprises potassium phosphate (0.08-0.12), potassium nitrate (0.1-0.3), magnesium sulfate (0.04-0.06), ferrous sulfate (0.001-0.002), molasses (6) and bran (3-5). The pH value is 6.5-7.0. The culture medium for mixed straw are molasses(8-12), egg(0.8-1.2), beef extract(0.01-0.02), fresh milk(0.8-1.2), crushed trash fish (2-4), carbamide (0.8-1.2) and potassium phosphate(0.8-1.2).