NOVELTY - A microbial organic fertilizer is prepared by adding microbial inoculum to animal litter, followed by selecting organic and inorganic inducers according to a fermentation microbial inoculum reproduction enzyme to carry out metering, confecting, pulverizing and homogenizing process. The fermentation microbial inoculum is induced to ferment and rot agricultural wastes, carrying out material blending and confection after fermentation and rotting to obtain the microbial organic fertilizer.    USE - Microbial organic fertilizer.    DETAILED DESCRIPTION - A microbial organic fertilizer is prepared by adding microbial inoculum to animal litter, followed by reducing water content of the fresh excrement to be 60-65%, carrying out dehydration treatment, mixing animal excrement and decomposed organic substance by adding 600-1000 g/T arbuscular mycorrhizal fungi agent, preparing solid culture medium comprising 30% plant grass meal, 15% bran, 5% Camellia, 5% fatty acid, 5% bone powder, 12% potassium sulfate, 4% ammonium phosphate, 5% phosphoric anhydride, 2% magnesium sulfate, 2% trimeric sodium phosphate, 3% diethanolamine and water, preparing enlarge culture medium by mixing solid nitrogen, phosphorus, a silicon type, cellulose and lignin at 35-38 degrees C, preparing fusion enlarging culture medium by mixing the solid culture medium and enlarge culture medium, selecting organic and inorganic inducer according to a fermentation microbial inoculum reproduction enzyme to carry out metering, confecting, pulverizing and homogenizing process. The fermentation microbial inoculum is induced to ferment and rot agricultural wastes at 40-55 degrees C for 1-2 days by maintaining humidity of 30% and selecting 50-70% processed substrate, 25-40% inducing agent and 5-10% inoculating agent, carrying out material blending and confection after fermentation and rotting to obtain the microbial organic fertilizer, where the arbuscular mycorrhizal fungi agent comprises Glomus mosseae, Glomus etunicatum, Glomus versiforme and arbuscular mycorrhizal fungi at a mass ratio of 2:2:1, the fermentation microbial inoculum is Bacillus laterosporus, Bacillus subtilis, Rhizobium leguminosarum, Aspergillus niger, Aspergillus oryzae, Humicola insolens and fermenting liquid at a volume ratio of 1:0.8:1-2:1.4:0.6:0.8:1.2.