Abstract:  Objective: To find alleviate sport fatigue composition form Jujube polysaccharide and to investigate it’s relative principle in sport body. Methods: With different withdraw method, get two kinds of sugar form Jujube polysaccharide, take male rat for test object, building up exhaust training model, finding the better composition; and building up a swimming model, infusing this Jujube polysaccharide to the rat, measured the activity of creatine kinase, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, superoxide dismutase, glutathione peroxide in serum after four weeks. Result: En- zyme-based extracting Jujube polysaccharide can raise the activity of superoxide dismutase, glutathione peroxide in serum, reduced the activity of creatine kinase, alanine aminotransferase, aspartate aminotransferase and Lactate dehydrogenase in serum. Conclusion: It is proved that enzyme-based extracting Jujube polysaccharide can alleviate sport fatigue.

Key words:  , Jujube polysaccharide； enzyme-based extraction； swimming； serum kinase；