Abstract:Polylactic acid (PLA) and thermoplastic starch (TPS) are natural and renewable biodegradable materials. Due to the good mechanical properties of PLA and the low cost of TPS, the blending of the two polymers shows high potential. Based on the published literature, first of all, the preparation principle of TPS and plasticizing modification of starch are introduced, and then based on the weak interface bonding between the limit and the compatibilizing mechanism of PLA/TPS blend, compatibilizing system were summarized, the research progress of natural fiber, inorganic nano materials are discussed and filler on the properties of blend system. Then, the less studied multilayer structure is introduced, which provides a new research idea for PLA/TPS system. Finally, the potential development and application of PLA/TPS system are prospected.