Jujube(Ziziphus Jujuba Mill.)has been used as a fruit and nutraceutical food in China for thousands of years.Recent phytochemical and pharmacological studies have certified that the polysaccharide is one of major biologically active component in jujube fruit and has various crucial biological effects,such as immunomodulation,antioxidant,antitumor,hepatoprotective,and hypoglycemic activities and gastrointestinal protective effect.