The invention relates to a method for extracting fly maggot animal protein by ceramic membrane separation technology. Fresh fly maggots are cleaned, broken, heat-treated, enzymatically hydrolyzed, and enzyme-killed, and the enzymolyzed solution is separated and purified by ceramic membrane separation technology. In the steps of concentration and spray drying, in the enzymatic hydrolysis solution, the coarse filter is used to remove large particles, and then the macromolecular colloid and oil are removed by ceramic microfiltration membrane and ultrafiltration membrane respectively, and the decomposed protein is mixed with Peptides and amino acids are separated, and the concentrated solution is spray-dried to obtain protein powder, which is then concentrated and dried by nanofiltration to obtain a mixture of polypeptides, amino acids and small molecular proteins. The method can effectively obtain the fly maggot protein, reduce the bitterness of the extracted product, have high extraction efficiency, and can simultaneously separate polypeptides and amino acid small molecule proteins.