NOVELTY - Preparation of amino acid microbial organic fertilizer includes drying roots of crops, crushing, heating with hydrochloric acid solution, cooling, and adding ammonium bicarbonate to obtain amino acid compound aqueous solution; fermenting vinegar lees, human and animal excrement, magnesium sulfate solution and ferrous sulfate solution to obtain biogas; heating sucrose and agar in water, adding mashed potatoes, soybean meal and yeast powder, fermenting, and adding carbon powder to obtain baking powder; and mixing with biogas, straw powder and plant meal, and fermenting to obtain organic compost.    USE - Method for preparation of amino acid microbial organic fertilizer (claimed).    ADVANTAGE - The fertilizer is suitable for mass production and more easy to absorb, provides amino acid, improves survival rate of microorganisms, crops yield and quality, and soil structure and fertility, and has low-temperature production process which ensures effectiveness of amino acids and microorganisms living environment and good product quality.    DETAILED DESCRIPTION - Preparation of amino acid microbial organic fertilizer comprises (A) drying roots of crops until moisture content is below 12%, crushing particle size of 1 mm or less, adding 2 pts. wt. root powder with 6-8 pts. wt. 26-28% hydrochloric acid solution, heating to 85-97 degrees C until completely dissolved, cooling to obtain hydrochloric acid hydrolysis solution, adding into alkali reaction tank, and gradually adding ammonium bicarbonate until pH is 6-8 to obtain amino acid compound aqueous solution; (B) mixing 20-30 pts. wt. vinegar lees, 35-45 pts. wt. human and animal excrement, 0.15 pts. wt. 3.5% magnesium sulfate solution and 0.15 pts. wt. 20% ferrous sulfate solution, adding into biogas fermentation tank, fermenting to 77-81 degrees C for 46-48 days, subjecting to solid-liquid separation, collecting solid, drying until moisture content is 61-67%, and adjusting pH to 7-8 to obtain biogas; (C) adding 10 pts. wt. sucrose and 15 pts. wt. agar in 200 pts. wt. water, stirring, heating to 55 degrees C until completely dissolved, adding 50 pts. wt. mashed potatoes, mixing, adding 50 pts. wt. soybean meal and 1 pt. wt. yeast powder, mixing pile, fermenting to 61-63 degrees C for 46-48 days, adding 100 pts. wt. carbon powder, stirring, and piling for 2-3 days to obtain baking powder; (D) mixing 1 pt. wt. baking powder, 23-27 pts. wt. biogas, 13-17 pts. wt. 1 mm or less crushed straw powder and 4-6 pts. wt. plant meal, piling into compost bin at height of 0.8-1 meter, statically fermenting, turning when core temperature of compost bin is 45 degrees C while keeping temperature to not less than 50 degrees C, and fermenting for 46-48 days to obtain organic compost; (E) adding short Bacillus laterosporus and/or Bacillus subtilis microbial strains into microbial fermentation device, and fermenting to obtain microbial agent having total effective viable count of 45000000000-55000000000/g; and (F) scattering organic compost, naturally air-drying until moisture content is 28-35%, and stirring to obtain organic fertilizer; and mixing 3-5 pts. wt. microbial agent, 45-55 pts. wt. amino acid compound aqueous solution and 800-1000 pts. wt. organic fertilizer, piling into compost bin at height of 0.8-1 meter, statically fermenting, turning when core temperature of compost bin is 45 degrees C while keeping temperature to not less than 50 degrees C, fermenting for 3-5 days at room temperature, air-drying, crushing into powder, granulating, and air-drying at room temperature until moisture content is 28-30%.