The antioxidant activities of crude polyphenol extracts from potato tuber were studied.The crude polyphenol extracts were extracted using ethanol,acetone and water.Antioxidant activities of three polyphenol extracts were studied including ·OH free radical scavenging,O-2· free radical scavenging,NO-2 scavenging and reducing power.The contents of polyphenol were also determined.Results showed that total polyphenol contents were 0.33~0.40 mg/mL.Three crude polyphenol extracts exhibit excellent antioxidation activitiy in different antioxidant assays.The order of antioxidation abilities were: 60% ethanol extract>60% acetone extract>water extract.This was positively correlated with the total polyphenol contents of the different polyphenol extracts.