NOVELTY - Biological organic fertilizer is obtained by preparing biological leavening agent by uniformly mixing e.g. calcium biphosphate, fermented soybean meal, rice bran, effective microbial inoculum and Aspergillus niger, performing anaerobic fermentation, then mixing manure, straw, earthworm, biological leavening agent and cellulase, adding water, performing fermentation, then adding e.g. sodium alginate and Bacillus subtilis powder, performing fermentation, crushing the fermented material, granulating and drying the granules to obtain the product.    USE - The biological organic fertilizer is useful for promoting growth of crops and increasing stress resistance of crops.    ADVANTAGE - The fertilizer is prepared by simple process in large quantities and environmentally-friendly. The fertilizer is rich in probiotics, effectively adjusts microbial content in soil and decomposes organic substances in soil, improves soil fertility, increases crop yield and quality of the crops, and has long-lasting effect.    DETAILED DESCRIPTION - Biological organic fertilizer is obtained by preparing biological leavening agent by uniformly mixing 3-5 pts. wt. calcium biphosphate, 6-8 pts. wt. fermented soybean meal, 10-15 pts. wt. rice bran, 10-15 pts. wt. corn powder, 3-5 pts. wt. colza cake, 10-15 pts. wt. bran, 8-10 wt.% adsorbent, 2-3 pts. wt. effective microbial inoculum and 1-2 pts. wt. Aspergillus niger, maintaining the moisture content of 35%, performing anaerobic fermentation at 25 degrees C for 7-10 days, then mixing 60-70 pts. wt. manure, 20-30 pts. wt. straw, 5-10 pts. wt. earthworm, 10-20 pts. wt. biological leavening agent and 3-5 pts. wt. cellulase, adding water, performing compost fermentation for 10-12 days, stirring the mixture, then adding 10-20 %mass sodium alginate, 5-10 %mass activated sludge, 1-2 %mass Bacillus subtilis powder and 1-2 %mass B.licheniformis powder, mixing uniformly, adding sugar syrup, performing secondary fermentation at 35 degrees C for 3-5 days, crushing the fermented material into 20-30 meshes sieve, granulating the mixture, drying the granules until the water content is 12-15% to obtain the product.