Abstract: In order to study the antioxidant activity of Chinese dwarf cherry seed oil (CDCSO) , the total antioxidant activity using the method of molybdenum complexes, potassium perricyanide and the ability to scavenge the hydroxyl radical (·OH) , superoxide anion radical (O-2·) , alkyl radical (R·) by the detection system of Fenton, the pyrogallol method oxidation and the Beauchamp C method were determined.The results showed that the total antioxidant activity of Chinese dwarf cherry seed oil increased with the increasing of the oil concentration, and the activity was between VC' s and olive oil's.In the Fenton reaction system, the activity of Chinese dwarf cherry seed oil to scavenge hydroxyl radical was more significant than VC 's and olive oil's.In the adjacent autoxidation system, Chinese dwarf cherry seed oil had some ability to scavenge superoxide anion radical, but the ability was lower than VC 's and olive oil's.In linoleic acid oxidation system, the ability of Chinese dwarf cherry seed oil to scavenge alkyl radical was better than VC's and olive oil's.So, It was concluded that Chinese dwarf cherry seed oil had better antioxidant activity.