NOVELTY - Preparing composite biological organic fertilizer comprises inoculating Bacillus subtilis CICC 23659 into a culture medium including starch, humate, bean cake powder, dipotassium hydrogen phosphate, ammonium sulfate, magnesium sulfate, ferric trichloride, calcium carbonate, yeast powder and boric acid, adjusting the pH value by culture medium, sterilizing the culture liquid, carrying out fermentation process and then stirring, adding the fermented bacterial liquid, and inoculating Streptomyces albospinus CGMCC 7434 into culture medium including glucose.    USE - The method is useful for preparing composite biological organic fertilizer (claimed).    ADVANTAGE - The method is capable of preparing composite biological organic fertilizer with improved yield and utilization rate of 30%, disease-resistance bacteria, and reduced pesticide residue.    DETAILED DESCRIPTION - Preparing composite biological organic fertilizer comprises (a) inoculating Bacillus subtilis CICC 23659 into a culture medium including 5 wt.% of starch, 1 wt.% of humate, 7.5 wt.% of bean cake powder, 0.2 wt.% of dipotassium hydrogen phosphate, 0.1 wt.% of ammonium sulfate, 0.05% of magnesium sulfate, 0.005 wt.% of ferric trichloride, 0.05 wt.% of calcium carbonate, 0.01 wt.% of yeast powder and 0.005 wt.% of boric acid, adjusting the pH value to 7.2-7.4 by culture medium, sterilizing the culture liquid at 120 degrees C for 20 minutes, carrying out fermentation process at 28-40 degrees C and then stirring speed at 150-200 revolutions per minute, pressure of 0.5 kg/cm2, adding the fermented bacterial liquid with concentration of 2x 109 colony-forming unit (cfu)/ml, (b) inoculating Streptomyces albospinus CGMCC 7434 into culture medium including 2.9 wt.% of glucose, 1.6 wt.% of soybean powder, 4 wt.% soluble starch, 1 wt.% of yeast powder, 1 wt.% of potassium humate, 0.4 wt.% of peptone, 0.05 wt.% of magnesium sulfate, 0.2 wt.% of sodium chloride and 0.5 wt.% of calcium carbonate, adjusting pH value to 0.5-8 to culture medium, sterilizing the bacterial liquid at 120 degrees C for 20 minutes, fermenting the sterilized liquid at 28-30 degrees C and then stirring speed at 150-210 rpm for 60-130 hours to obtain fermentation bacterial liquid, crushing the fermentation bacterial liquid with concentration of 1.5x 109 cfu/ml, (c) inoculating Paecilomyces lilacinus CGMCC3.4034 into the culture medium including 2 wt.% of soluble starch, 0.1 wt.% of potassium nitrate, 0.05 wt.% of dipotassium hydrogen phosphate, 0.05 wt.% of magnesium sulfate, 0.05 wt.% of sodium chloride and 0.001 wt.% of ferrous sulfate, adjusting pH value to 7.2-7.4 by culture medium, fermenting the culture at 30-37 degrees C for 12-24 hours, stirring the bacterial liquid at rotating speed of 200-300 rpm, and adding the fermentation liquid with concentration of 2x 109 cfu/ml, (d) inoculating Candida utilis CICC 1422 into yeast culture medium, and adding the fermentation liquid with concentration of 1x 109 cfu/ml, fermenting the culture at temperature of 25-40 degrees C for 36-72 hours, stirring in sterile air at ventilation quantity of 8-10 l/l/rpm and rotating speed of 200-300 rpm, (e) inoculating Rhodopseudomonas palustris ATCC 17001 into culture medium including normal nutrient agar culture medium or broth culture medium, and culturing the liquid at temperature of 25-40 degrees C under illumination anaerobic culturing for 36-48 hours in the fermentation liquid with concentration of 1x 109 cfu/ml, (f) inoculating Lactococcus lactis ACCC 11054 into the liquid culture medium including 20 wt.% of tomato juice, 0.05 wt.% of soluble starch, 1.5 wt.% of peptone, 5 g sodium chloride, 0.6 wt.% of yeast and 2 wt.% of glucose, adjusting pH value to 7.2 by liquid culture medium, sterilizing culture liquid at 30-35 degrees C for 2-3 days with concentration of 5x 109 cfu/ml, inoculating the seed culture into 5% of brown sugar and 50 l of sterile water, fermenting the liquid at 25-30 degrees C in a sealed tank for 10-15 days, adding 40-50 wt.% of calcium carbonate were added by the bacterial strain, stirring the liquid for 30-40 minutes, dehydrating and concentrating the liquid at low temperature, drying the material to moisture content of less than or equal to 5%, pulverizing the mixture into strain bacteria powder with fineness of greater than or equal to 100 meshes and then adding 50-55 pts. wt. of Bacillus subtilis, 10-15 pts. wt. of Actinomycetes, 8-10 pts. wt. of photosynthetic bacteria, 6-10 pts. wt. of Paecilomyces lilacinus, 3 pts. wt. of yeast, and 2-4 pts. wt. of Bifidobacterium, mixing 30 wt.% of potassium humate, 0.5 wt.% of zeolite powder and 65 wt.% of potassium fulvate in the bacteria powder and then drying at low temperature, pelletizing, cooling, sieving, checking and packaging.