[Objective] To evaluate the antioxidant activity of polysaccharide extracted from Radix Ginseng rubra in vitro.[Methods] Radix Ginseng rubra polysaccharide,extracted with water at 100℃ for 4h with radix ginseng rubra to water ratio of 1:10,used as experimental material for antioxidant activity study.The antioxidant activity of polysaccharide in vitro was evaluated by the methods of scavenging DPPH radical,scavenging hydroxyl radical(·OH) or reducing power.[Results] The results showed that the scavenging cap...