To isolate and extract jujube polysaccharide from jujube and analyse its effect on cleaning all kinds of oxygen radical,a technique with hot water extract, ethanol sedimentation, chloroform and butanol deproteinization was preformed. Sugar content was also determined. With the help of chemiluminescent analysis,we separately determined JPS cleaning activities to oxygen free radicals of H 2O 2,O · 2, ·OH in whole blood from Chemiluminescence, O · 2 from Pyrogallol autooxidati...