Abstract: Tea polysaccharides,short for polysaccharide conjugates with bioactivity in tea,have exhibited the well-known hypoglycemic effects and antidiabetic activity,due to its protection of islet β cell,restriction of carbonhydrate absorption and regulation of endogenous factors(glucose metabolizing enzyme and insulin). Furthermore,the paper summarizes research progress on the other pharmacological activities and mechanism of actions of polysaccharide prepared from tea(Camellia sinensis). Various pharmacological activities,including antioxidant activity,immunostimulating activity,antitumor activity,anticoagulant activity,anti-fatigue activity,antibacterial and antiviral activity,and anti-obesity activity are described for the further study.