The invention relates to a method for manufacturing amino-acid fishpond fertilizer water aqua by waste bave protein. The method comprises the following steps of: preparing corresponding amino-acid hydrolysate by waste water, waste bave, waste silkworm pupae and the like of a reeling mill, and preparing the amino-acid fishpond fertilizer water aqua through the amino-acid hydrolysate, namely preparing amino-acid by hydrolyzing the bave protein, then adding urea, ammonium phosphate, potassium sulfate, ferric citrate, vitamin B1, vitamin B12, microbe consortium, trace elements and the like, and preparing the amino-acid fishpond fertilizer water aqua. According to the method, a brand-new way for reusing the reeling waste is developed, so that the cost and the pressure of the conventional sewage treatment method are reduced; and furthermore, the economic benefit of a factory and the yield of the factory are increased. The amino-acid fishpond fertilizer water aqua prepared by the method is low in cost, and has high quality and market competition. After the amino-acid fishpond fertilizer water aqua is added, the water quality can be improved effectively, so that the optimal growth environment is supplied to fishes.