The antioxidant acticities of Perilla meal polysaccharide PWPS were studied in this paper.The power of PWPS for reduction,superoxide anion radical O2- clearance and hydroxy radical -OH clearance was measured respectively.The results indicate that Perilla meal polysaccharide PWPS has strong reducing power,has some effect on scavenging .OH. PWPS has some scavening actibity to O2-.In low concentration but loses the scavenging ability in high concentration and shows prooxidat property in high concentration.In conclusion,PWPS has some antioxidant activitities.