Abstract: The gingerols from gingerwere extracted with supercritical CO2 fluid extraction. The gingerols is ex2 tremly unstable in strong acid, and can dehadrate to be shogaol, while shogaol can take the addition reaction with glycine to form the shogaol2glycine so as to enhance the stability of gingerols. Shogaol2glycine was analysed by UV spectrophotometric method and differential pulse voltammetry in this paper. The results showed that there were the maximum absorp tion at 230 nm and 280 nm wavelengh (A230: A280 is about 1. 776) in the UV spectrophotome2 try. The determination of shogaol2glycine was performanced with differential pulse voltammetry. It was found that the electrochemistry activity was enhanced when pH was from 2 to 8 under the glassy carbon work electrode. Shog2 aol2glycine has higher scavenging activity. The scavenging ratio was imp roved with the increasing of the shogaol2gly2 cine, the ratio was 81. 8% when the addition was 0. 125 mg. Itwas found that the free radical scavenging capacities of the the shogaol2glycine had higher than that of glycine.