Abstract:Due to the increasing prominence of environmental problems，new green packaging materials have become a research priority.Soybean is widely considered to be one of the main agricultural products used in China.Soybean protein isolate，a natural macromolecule，has gradually become a substitute for petroleumbased polymer materials due to its good film-forming ability and biodegradability and it has been widely used in commercial and daily life applications.In this study，soybean protein isolate was used as a membrane substrate and the modification of soybean protein isolate，surface modification，nano-modification and modification based on blending with polymers were reviewed with the aim of increasing the suitability of this degradable membrane to meet requirements for use in additional applications.These，as well as prospects to develop a degradable membrane，were analyzed and assessed.