NOVELTY - Method (M1) for preparing comprehensive powdery product, involves sedimenting humus soil, mixing product with silica, performing centrifugal separation, mixing nutritional solution with supernatant, filtering mixture, mixing nutritional solution with obtained supernatant, stirring and extracting mixture to obtain extract (A), collecting saliva from buffalo, filtering the saliva, crushing and extracting obtained precipitate to obtain extract (B), mixing the extract (A) and extract (B), adding e.g. enzyme-producing bacterial strain, and fermenting product.    USE - The method is useful for preparing comprehensive powdery product which is used in fertilizer (all claimed).    ADVANTAGE - The method prepares fertilizer which promotes plant root, stem, and growth of leaves, and improves quality of crops.    DETAILED DESCRIPTION - Method (M1) for preparing comprehensive powdery product, involves (a) selecting humus soil, cleaning and sedimenting the humus soil, controlling pH of obtained product at 3-4, and mixing the product with silica to obtain mixture, (b) controlling pH of the mixture at 5-6, and subjecting the mixture to centrifugal separation to obtain supernatant, (c) mixing nutritional solution and the supernatant in a ratio of 1:2.5-3.5 to obtain mixture, (d) filtering the mixture to obtain supernatant, mixing the nutritional solution and the supernatant in a ratio of 1:2.5-3.5 to obtain mixture, uniformly stirring the mixture, and extracting the mixture to obtain extract (A), (e) collecting saliva from oral cavity of buffalo, controlling pH of the saliva at 3-4, filtering the saliva to obtain supernatant and precipitate, crushing the precipitate, and extracting crushed precipitate to obtain extract (B), (f) mixing the extract (A) and extract (B), and adding enzyme-producing bacterial strain to mixture, where ratio of the enzyme, extract (A) and extract (B) is 0.9-1.1:0.2-0.4:0.9-1.1, and (g) mixing 1-3 pts. wt. product obtained in step (f), 8-12 pts. wt. urea, 12-16 pts. wt. calcium superphosphate, 9-11 pts. wt. potassium sulfate, 0.1-0.8 pt. wt. ferrous sulfate, 0.1-0.6 pt. wt. zinc sulfate, 0.1-0.6 pt. wt. molybdenum, 0.1-0.6 pt. wt. boric acid, 9-11 pts. wt. brown sugar, 17-24 pts. wt. rice bran, 25-35 pts. wt. rapeseed cake and 9-11 pts. wt. wheat bran, adding water to obtained mixture, stirring the mixture, performing aerobic fermentation for 15-25 days, controlling humidity at 55-70% during fermentation, and drying and crushing obtained product. An INDEPENDENT CLAIM is included for method (M2) for preparing fertilizer, which involves using the above-mentioned comprehensive powdery product.