Oat seeds were steeped and germinated.Polyphenol compounds were extracted by 80% methanol,ethanol and acetone solvent respectively from non-germination oat,germinated seed,bud and root after 6 d's germination.Total phenolic yield,reducing power,scavenging activity to DPPHo radical and nitrite have compared.The results indicated that oat polyphenols had strong reducing power and scavenging effects to DPPHo radical and nitrite in both germinated and non-germinated seeds.The antioxidant activity of different solvents extracts was closely related to the kind and polarity of oat polyphenols.The antioxidant activity was higher in the germinated seeds.