Dry fruits of Jingning Gouqi(Lycium barbarum)from Gansu province were used as the main material. The pigment was extracted by acetone and petroleum ether solvent with the volume ratio 1 to 5. The antioxidant activity was evaluated by the reducing power of the pigment of Gouqi before and after saponification,the scavenging capacity for free radical DPPH·,O2-,·OH,the antioxidant activity for lipid,the synergy with Vc were determined. Comparison with traditional antioxidants,such as VE and Vc on antioxidant activity was also tested. The results showed that the pigment of Gouqi had a certain degree of reducing power and could scavenge DPPH·,·OH and O2-free radical effectively. Its inhibition of lipid oxidation was gradually increased with the concentration. The antioxidant activities in order was:Vc> the pigment of Gouqi before saponification> Vc+ pigment of Gouqi after saponification>VE> the pigment of Gouqi after saponification.