Abstract:In this study，fish skin gelatin was used as a film-forming substrate，and L-arabinose，glycerin，and sorbitol were used as modifiers.Edible films were prepared using a casting method. Taking tensile strength and elongation at breaking point as the target optimization indicators，the best film preparation process was determined through single factor and orthogonal testing. The optimal mass ratio of L-arabinose to fish skin gelatin was 2 ∶8，and the optimal mass ratio of plasticizer components （glycerin:sorbitol）was 2 ∶1.Optimized plasticizer concentration was 20%，and water bath temperature was 60 ℃.Optimal incubation time was 40 min.These conditions yielded edible films with the best mechanical properties[tensile strength and elongation at breaking point reached（17.46±2.59）MPa and（116.95±13.05）%，respectively].