NOVELTY - A compound amino acid biological liquid fertilizer comprises a main ingredient A, a main ingredient B, a main ingredient C, bentonite, ammonium sulfate, calcium superphosphate, potassium sulfate, magnesium sulfate, waste molasses and water.    USE - Compound amino acid biological liquid fertilizer for crops.    ADVANTAGE - The fertilizer is prepared by leftover bits and pieces of seafood industry and meat food processing industry, urine of livestock husbandry and biogas fermentation residues discharged by biogas digesters through integrated biological fermentation pollution-free processing technique, so that yield of crops can be increased, quality of crops can be improved, and soil is improved, thus enhancing soil fertility quickly and effectively, and increasing sustainable development of agriculture and ecological environment.    DETAILED DESCRIPTION - A compound amino acid biological liquid fertilizer comprises 200-300 pts. wt. main ingredient A, 100-200 pts. wt. main ingredient B, 100-200 pts. wt. main ingredient C, plus minus 50 pts. wt. bentonite, 50 pts. wt. ammonium sulfate, 50 pts. wt. calcium superphosphate, 50 pts. wt. potassium sulfate, 50 pts. wt. magnesium sulfate, 100 pts. wt. waste molasses and 200 pts. wt. water. The main ingredient A comprises 5-8 % fermentation culture body and 0.03-0.05 % compound enzyme preparation composition. The fermentation culture body comprises 2 % fermentation reagent, 18 % fish meal, 18 % bone meal, 18 % cypress beans, 18 % rice bran, 10 % cypress rapeseed, 10 % wheat bran, 5 % ammonium sulfate and 1 % brown sugar. The main ingredient B comprises 1000 pts. wt. raw ingredient B, 200 pts. wt. water, 50 pts. wt. molasses, 5-8 % the fermentation culture body and 0.03-0.05 % compound enzyme preparation composition. The ingredient B is raw material of rapeseed and soybean. The main ingredient C comprises 5-8 % fermentation culture body and 0.03-0.05 % compound enzyme preparation composition. The ingredient C is used in biogas slurry residue, and livestock urine of cows, cattle and pig. An INDEPENDENT CLAIM is also included for a compound amino acid biological liquid fertilizer preparation method involves mixing 200-300 pts. wt. main ingredient A, 100-200 pts. wt. main ingredient B, 100-200 pts. wt. main ingredient C, plus minus 100 pts. wt. bentonite at room temperature, fermenting the obtained product for 15 days, adding and mixing 50 pts. wt. ammonium sulfate, 50 pts. wt. calcium superphosphate, 50 pts. wt. potassium sulfate, 50 pts. wt. magnesium sulfate and 100 pts. wt. waste molasses diluted with 200 pts. wt. water by waste molasses solution, fermenting the obtained composite for 3 days, filtering the obtained product to obtain composite amino biological fertilizer, where the ingredient A is obtained by crushing the raw material to 5-10, adding 5-8 % the fermentation culture body and 0.03-0.05 % compound enzyme preparation composition with the obtained product, performing fermentation of the obtained product for 45 days at room temperature to obtain the ingredient A, where the fermentation culture body is prepared by mixing the 2 % fermentation reagent, 18 % fish meal, 18 % bone meal, 18 % cypress beans, 18 % rice bran, 10 % cypress rapeseed, 10 % wheat bran, 5 % ammonium sulfate, and 1 % brown sugar into a blender, at speed of 23-26 rev/min for 5 minutes, transferring the obtained product to interior concrete floor, piling up the obtained product into a triangle body for 1-2 meters, and covering the obtained product with tarps, where the fermentation body is heated at temperature 45 -60 degrees C, moisture mass content of the obtained product is 50-60 %, and the obtained fermentation culture body is fermented for 45 days, where the ingredient B is prepared by mixing 500 pts. wt. rapeseed cypress, 500 pts. wt. cypress beans and 50 pts. wt. soybean with 200 pts. wt. water diluted molasses liquid mixture, adding 5-8 % fermentation culture body and 0.03-0.05 % compound enzyme preparation composition, uniformly mixing the obtained, and performing fermentation for 30 days to obtain the ingredient B, where the ingredient C is prepared by uniformly mixing 0.03-0.05 % compound enzyme preparation composition in 5-8 % the fermented culture body, and fermenting a fermentation tank at room temperature for 30 days to obtain the ingredient C, and utilizing the ingredient C in slurry residue and livestock urine of cows and pigs.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a compound amino acid biological liquid fertilizer preparation method. '(Drawing includes non-English language text)'