NOVELTY - Amino acids-rich fertilizer is prepared by drying and crushing roots or stems of crops to obtain powder, mixing the powder with hydrochloric acid solution, performing hydrolysis, adding ammonium bicarbonate to obtain aqueous amino acid solution, preparing fermentation powder using e.g. sucrose and yeast, mixing fermentation powder with e.g. fresh dairy manure, processing mixture to obtain organic fertilizer, preparing microbial agent using e.g. Brevibacillus laterosporus, and mixing the microbial agent, aqueous amino acid solution and organic fertilizer.    USE - The amino acids-rich fertilizer is useful for improving quality and yield of crops.    ADVANTAGE - The fertilizer improves soil structure and soil fertility.    DETAILED DESCRIPTION - Amino acids-rich fertilizer is prepared by (a) drying roots or stems of crops until water content of dried roots or stems reaches less than 12%, and crushing dried roots or stems to obtain powder having particle diameter of less than or equal to 1 mm, (b) mixing 2 pts. wt. powder obtained in step (a) with 6-8 pts. wt. hydrochloric acid solution, subjecting obtained mixture to hydrolysis at 85-97 degrees C, and cooling hydrolyzate, where the hydrochloric acid solution is 26-28% aqueous hydrochloric acid solution, (c) gradually adding ammonium bicarbonate to the hydrolyzate until pH of the hydrolyzate reaches 6-8 to obtain aqueous amino acid solution, (d) preparing fermentation powder by mixing 10 pts. wt. sucrose, 15 pts. wt. agar and 200 pts. wt. water at 55 degrees C, stirring obtained mixture, adding 50 pts. wt. mashed potatoes and 50 pts. wt. soybean meal to the mixture, uniformly mixing and stirring obtained mixture, adding 1 pt. wt. yeast to the mixture, adding the mixture to fermenter, fermenting the mixture at 61-63 degrees C for 46-48 days, adding 100 pts. wt. coal powder to mixture, uniformly stirring obtained mixture, and stacking the mixture for 2-3 days, (e) obtaining 1 pt. wt. fermentation powder, 90-110 pts. wt. fresh dairy manure, 90-110 pts. wt. selenium-enriched straw powder, 145-165 pts. wt. biogas slurry and 40-60 pts. wt. plant cake, crushing plant cake to obtain powder, uniformly mixing the powder with fresh dairy manure, stirring obtained mixture, and controlling water content of the mixture at 60-70%, where the selenium-enriched straw powder is obtained by drying and crushing the selenium-enriched straw to obtain powder having particle diameter of less than 10 mm, (f) adding selenium-enriched straw powder to the biogas slurry, stirring obtained mixture, maintaining the mixture at static condition, adding the fermentation powder and mixture obtained in step (e), stacking the mixture to a height of 0.8-1 m, and fermenting the mixture at more than 45 degrees C for 46-48 days to obtain organic compost, (g) preparing microbial agent by mixing Brevibacillus laterosporus, B.subtilis or their mixtures, where viable count of microorganisms in the microbial agent is 4500-5500 million microbial cells/g, and (h) stirring the organic compost, naturally drying the organic compost until water content of the organic compost reaches 28-35% to obtain organic fertilizer, uniformly mixing 3-5 pts. wt. microbial agent, 45-55 pts. wt. aqueous amino acid solution and 800-1000 pts. wt. organic fertilizer, stacking obtained mixture to a height of 0.8-1 m, heating the mixture at 45 degrees C, air-drying the mixture at room temperature for 3-5 days, crushing dried mixture, adding the mixture to granulator, controlling water content of the mixture at 28-30%, and granulating the mixture to obtain product.