NOVELTY - Preparing microbial fertilizer involves utilizing (in pts.wt.): animal's blood hydrolysis liquid (50-65), chitosan, hydrolyzed liquid (55-75), composite trace element (5-15), potassium dihydrogen phosphate (8-20), urea (10-25) and mixed liquid (800-872). The mixed liquid is prepared by mixing Bacillus amyloliquefaciens inoculum (0.3-0.5%) into fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain a de-starch Bacillus amyloliquefaciens liquid.    USE - Method for preparing microbial fertilizer used for promoting plant root.    ADVANTAGE - The method enables to prepare microbial fertilizer in a simple manner, increases disease resistant ability and stress ability of crops, reduces amount of fertilizer, improving soil quality and increases number of soil microorganism.    DETAILED DESCRIPTION - Preparing microbial fertilizer involves utilizing (in pts.wt.): animal's blood hydrolysis liquid (50-65), chitosan, hydrolyzed liquid (55-75), composite trace element (5-15), potassium dihydrogen phosphate (8-20), urea (10-25) and mixed liquid (800-872). The mixed liquid is prepared by mixing Bacillus amyloliquefaciens inoculum (0.3-0.5%) into fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain a de-starch Bacillus amyloliquefaciens liquid. Bacillus amyloliquefaciens liquid (0.3-0.5%) is mixed with the fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain Bacillus subtilis liquid. Bacillus subtilis liquid comprises (in %): glucose (6), soybean powder (5), dipotassium hydrogen phosphate (1), yeast extract (1), magnesium sulfate (0.03), calcium carbonate (0.5) and balanced amount of water. Bacillus subtilis liquid inoculum (0.3-0.5%) is mixed with the fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain Bacillus licheniformis liquid. Bacillus licheniformis liquid comprises (in %): corn starch (10), glucose (6), molasses (15) and balanced amount of water. Bacillus licheniformis liquid is mixed with the fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain Bacillus thuringiensis liquid. Bacillus thuringiensis liquid comprises (in %): potassium hydroxide (4), phosphoric acid (3), urea (2), beef extract (1), magnesium sulfate (0.1), zinc sulfate (0.1) and balanced amount of water. Bacillus thuringiensis liquid inoculum (0.3-0.5%) is mixed with the fermentation liquid and then aerobic fermentation is carried out at 35-38?o C for 45-50 hours to obtain Bacillus mucilaginosus liquid. Bacillus mucilaginosus liquid comprises (in %): corn starch (10), peptone (0.5), glucose (2), beef extract (1), dipotassium hydrogen phosphate (0.5), magnesium sulfate (0.03), calcium carbonate (0.5) and balanced amount of water. Bacillus amyloliquefaciens, Bacillus subtilis, Bacillus licheniformis, Bacillus thuringiensis and Bacillus mucilaginosus liquids are mixed in ratio of 5-1:2-1:1:1:1 to obtain a mixed liquid. The mixed liquid is added with remaining components and hydrolyzed at 75-80?o C for 8-12 hours, and then at 120?o C to obtain the desired product.