oy protein isolates(SPI) and soluble soybean polysaccharides(SSPS) were used as the main raw material to prepare edible composite film.The properties of the film were studies.The ratio of SPI to SSPS,the addition amount of glycerin and sodium alginate and calcium ion concentration were chosen as the effect factors.Single factor experiment and orthogonal tests were conducted to explore the optimal formula of SPI and SSPS composite film.The properties of the composite film were evaluated by water soluble,water vapor permeability,tensile strength,and breaking elongation rate.The results showed that the optimal formula of SPI and SSPS composite film was: SPI to SSPS ratio 1∶ 7,glycerin addition amount 2%,sodium alginate 4%,and calcium ion concentration 1.0mol / L.Under the optimal process conditions,the comprehensive performance of SPI and SSPS compound film had highest score of 67.79.