The kiwifruit was used as the research object to determine the total phenols, total reducing ability, hydroxyl free radical scavenging rate, superoxide free radical scavenging rate and 2,2‘-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) free radical scavenging rate of the kiwifruit in the control group and different swelling agent treatment groups (CPPU and TDZ). The effect of different swelling agent treatments (CPPU and TDZ) on the total phenols and antioxidant activity of Kiwifruit were determined forand screening out for their possible impact. The result showed that total polyphenols content and antioxidant activity of Kiwifruit could be reduced by TDZ treatment. In brief, the TDZ treatment had a significant effect on the total polyphenols content, total reducing capacity, hydroxyl radical scavenging rate and superoxide radical scavenging rate, had little effect on the ABTS+?scavenging rate. The result showed that the content of polyphenols was significantly reduced at the TDZ residual concentration of 0.04 mg/kg. The residual of TDZ more than 0.02 mg/kg could significantly reduce the total reducing power and hydroxyl radical scavenging capacity. The residual of TDZ more than 0.04 mg/kg could significantly reduce the ABTS+? scavenging capacity and superoxide radical scavenging capacity. And TDZ had a greater influence on the total reducing power and hydroxyl radical scavenging capacity, and had little effect on the ABTS+?scavenging capacity and superoxide radical scavenging capacity.