Flavonoids was extracted and purified from Hong Guo Ginseng. The antioxidant activity of purified flavonoids,Vc,combination solution of flavonoids and Vc( 1∶ 1) were investigated by testing scavenging effects of ·OH、O2-·,reducing ability of Fe3 +and inhibition of the peroxidation oflipids. The results showed that at the same concentration of 0. 65 g / L,the scavenging rate of flavonoids to ·OH and to O2-· were 21. 07% and 24. 23%. The scavenging rate of combination solution to · OH and O2-· were 25. 50% and...