Grape skin procyanidins as raw material were separated according to their polymerization degrees by solvent precipitation in this paper.The capability of scavenging sodium nitrite and DPPH· were determined by spectrophotometry,and compared with vitamin C,BHT.The results demonstrated that the scavenging rate of NaNO₂ and DPPH· showed the positive correlation with the concentration of the grape skin proanthocyanidins,the capability of scavenging NaNO₂ and DPPH· was 94.61% and 92.56%,respectively.It was explored that with the increase of polymerization degree,the capability of scavenging decreases.