Abstract:It was to study the total reducing ability of different extractives and their scavenging activity to hydrox－ yl radical by utilizing different extraction methods to obtain total extract of eleocharis tuberose peel in this thesis. The result showed that different extractives have different total reducing abilities and scavenging activities to hy－ droxyl radical. There was a dose-effect relationship between total reducing ability and scavenging activity to hy－ droxyl radical which showed different extractives have certain antioxidant ability. Among them， the strongest an tioxidant ability was using acidic ethanol as extracting agent extracts of microwave assisted extraction.