Soybean residue was used as substrate, sodium alginate and carboxymethyl cellulose as film-former, glycerin as plasticizer, to prepare edible film. The influence of film-former and plasticizer on the film performance was studied. The optimum edible film formula was determined with orthogonal test. The result showed that when soybean residue is 2.0 g, carboxymethyl cellulose is 1.4 g, sodium alginate is 1.0 g, glycerin is 1mL, and the comprehensive performance of composite edible film is good. The purpose of this study was to recycle and protect environment.