[Objectives]The research aimed to compare antioxidation abilities of different extraction phases of Hippophae rhamnoides L. leaves extract and find its active marker. [Methods] H. rhamnoides L. leaves were extracted firstly by 75% of ethanol,and then were extracted by petroleum ether,chloroform,ethyl acetate and n-butanol in turn after decompression concentration. Via DPPH and ABTS~+ radical scavenging experiments and Fe~(3+) reduction experiment,antioxidation activity of each phase was evaluated. And chemical compositions related to its antioxidation activity were determined by using UPLC for qualitative identification. [Results] Antioxidation activity sequence of each phase was ethyl acetate phase≈n-butanol phase > alcohol extract of raw material > water phase > chloroform phase > petroleum ether phase. 33 kinds of chemical compositions were isolated from alcohol extract and extracts by using UPLC. [Conclusions] UPLC and antioxidation activity test were used simultaneously to analyze alcohol extract and extracts of H. rhamnoides L. leaves,which could fast and accurately determine extraction phase with the strongest antioxidation ability. The research is significant to study active ingredients and mechanism of antioxidation from H. rhamnoides L. leaves. [Objectives] The research aimed to compare antioxidant abilities of different extraction phases of Hippophae rhamnoides L. leaves extract and find its active marker. [Methods] H. rhamnoides L. leaves were extracted first by 75% of ethanol, and then were extracted by Pesticides, petroleum ether, chloroform, ethyl acetate and n-butanol in turn after decompression concentration. Via chemical and physical properties of via DPPH and ABTS ~ + radical scavenging experiments and Fe ~ (3+) reduction experiment, antioxidant activity of each phase was evaluated. antioxidation activity were determined by using UPLC for quality identification. [Results] Antioxidation activity sequence of each phase was ethyl acetate phase≈n-butanol phase> alcohol extract of raw material> water phase> chloroform phase> petroleum ether phase. 33 kinds of chemical compositions were isolated from alcohol extract and extracts by using UPLC. [Conclusions] UPLC and antioxidation activity test were used simultaneously to analy ze alcohol extract and extracts of H. rhamnoides L. leaves, which could fast and accurately determine extraction phase with the strongest antioxidant ability. The research is significant to study active ingredients and mechanism of antioxidation from H. rhamnoides L. leaves.