Abstract: Properties of thermoplastic starch (TPS) were briefly introduced. Research development of blends of TPS with synthetic polymer, including poly(lactic acid)(PLA), poly(εcaprolactone(PCL), acid alcohol copolyester, poly(propylene carbonate)(PPC), poly(vinyl alcohol)(PVA) and natural polymer was reviewed. In the end, problems and development direction of starchbased biodegradable plastics were forecast.