NOVELTY - Preparation of organic fertilizer includes inoculating plant organic material and poultry and livestock dry excrement raw materials with beneficial microbial flora mixed liquid including lactic acid strain liquid, yeast seed liquid, and nitrogen-fixing bacteria seed liquid, fermenting, naturally cooling and drying, mixing the processed mixed material with unprocessed raw material, adding powdered rock phosphate, potassium mineral powder, coal powder, sugar powder, and/or urea, mixing uniformly, and pressing to obtain organic fertilizer.    USE - Preparation of organic fertilizer (claimed).    ADVANTAGE - The method is simple and fast, has low cost, saves composting area by 80% compared with the prior art, and provides organic fertilizer with high organic matter content, no aging failure and carbonization, and no large amount of loss caused by water dissolution.    DETAILED DESCRIPTION - Preparation of organic fertilizer comprises taking plant organic material and poultry and livestock dry excrement as raw materials, inoculating beneficial microbial flora mixed liquid, fermenting to obtain solid mixed material, machine turning the solid mixed material, standing the mixed material at normal temperature for natural fermentation until 70-75 degrees C, naturally cooling and drying, mixing the processed mixed material with unprocessed raw material at 10:25-50 weight ratio, adding powdered rock phosphate, potassium mineral powder, coal powder, sugar powder, and/or urea, mixing uniformly, and pressing to obtain organic fertilizer having organic matter content of more than 36%, nitrogen-phosphorus-potassium content of more than 6%. The beneficial microbial flora mixed liquid comprises lactic acid strain liquid, yeast seed liquid, nitrogen-fixing bacteria seed liquid, photosynthetic bacteria seed liquid, actinomycetes strain seed liquid, and mixture of water, sugar, and orange at 7-13:7-13:5-10:7-13:5-10:0.5-2. The viable count of lactic acid strain liquid, yeast seed liquid, nitrogen-fixing bacteria seed liquid, photosynthetic bacteria seed liquid is greater than or equal to 1 billion/ml. The viable count of actinomycetes strain seed liquid is greater than or equal to 400 million/ml. An INDEPENDENT CLAIM is included for organic fertilizer.