PLA/TP biodegradable blend film was prepared by choosing polylactide(PLA) as film forming substrate, and tea polyphenols(TP) as antioxidant. The effects of tea polyphenols content on the packaging properties and oxidation resistance of blend films were studied. The results showed that there were reactions between tea polyphenols and polylactic acid copolymer, and tea polyphenols had good dispersibility in polylactic acid matrix. The addition of tea polyphenols decreased the tensile strength, elongation at break and light transmittance of the blend films, but obviously improved the heat sealing strength, barrier property, oxidation resistance and free radical scavenging rate. When the mass fraction of tea polyphenols was 0.9%, the heat sealing strength of the blend film was 3.31 N/(15 mm), the coefficient of moisture and oxygen permeability were 1.68 and 6 times that of pure PLA respectively, the light transmittance was 88.1%, the free radical scavenging rate was 89.18%. The blend film has application potential in eco-friendly active food packaging material.