NOVELTY - Biological organic fertilizer comprises (in parts mass): major ingredient A (600-1000), fermented culture portion (30), ammonium sulfate (50), calcium superphosphate (50), magnesium aluminum silicate powder (50) and prepared auxiliary material, where the major ingredient A is livestock excrement and/or urban living garbage. The major ingredient A comprises amylase, fiber enzyme and lipase, and the fermentation medium comprises fish meal, bone powder, soybean meal, rice bran, rapeseed phellodendron, wheat bran, ammonium persulfate, brown granulated sugar.    USE - As biological organic fertilizer.    ADVANTAGE - The method is environmentally-friendly, uses large quantity of regenerative organic waste resources, turns the waste into wealth, and promotes sustainable development of agricultural and ecological environments.    DETAILED DESCRIPTION - Biological organic fertilizer comprises (in parts mass): major ingredient A (600-1000), fermented culture portion (30), ammonium sulfate (50), calcium superphosphate (50), magnesium aluminum silicate powder (50) and prepared auxiliary material, where the major ingredient A is livestock excrement and/or urban living garbage. The major ingredient A comprises amylase, fiber enzyme and lipase in the ratio of 4:3:3, the fermentation medium comprises (in wt.%): fish meal (2), bone powder (18), soybean meal (18), rice bran (18), rapeseed phellodendron (10), wheat bran (10), ammonium persulfate (5), brown granulated sugar (1), and the fermenting agent is Bacillus megatherium, Lactobacillus bulgaricus, L.acidophilus, beer yeast and pasteurization Clostridium in the ratio of 2:2:2:2:2. An INDEPENDENT CLAIM is included for method for preparing the biological organic fertilizer, which involves adding major ingredient A to fermentation medium, adding ammonium sulfate, calcium superphosphate, magnesium aluminum silicate powder and water to the medium, mixing the mixture uniformly at more than 65 degrees C, cooling the mixture to normal temperature, stacking the mixture, fermenting the mixture, and aging the mixture for 20-25 days.