Using polyvinyl alcohol ( PVA ) and soluble starch as film-forming matrix, glycerol as plasticizer, and sweet corncob polysaccharide ( SCP ) as raw material, silver nanoparticles ( AgNPs ) were added to enhance the comprehensive packaging performance and prepare composite film materials. The tensile strength was used as an index to optimize the single factor and response surface experiments, and the film materials were characterized by SEM and Fourier transform infrared spectroscopy. The results showed that the tensile strength of PVA-AgNPs film was ( 14.08 ± 0.58 ) MPa, and it had degradable ability. Compared with PVA film, the water resistance and barrier ability of PVA-AgNPs film were enhanced. In addition, the use of PVA-AgNPs film as a packaging material at 4 °C storage conditions reduced the weight loss rate, spoilage rate, soluble solids and VC content loss of strawberries, and effectively slowed down the softening and decay of strawberries. The amount of silver migration in the fruit after storage was 0.00188 mg / kg, which was much lower than the national standard.