Objective:To study the effect of Co-Lingzhi jiangtang Capsule to type Ⅱ melituria rats. Method: To make the model of type Ⅱ melituria rats with feeding hyper-lipid fodder and injecting a small dosage STZ to intraperitoneum.And then the modle rats were divided into 7 groups and administered.After administration the blood samples were taken to determine their blood glucose,TG,TC,and SOD.Results: Compareing to control group,the capsule has obvious effects on lowering blood glucose,TG and TC and enhanceing SOD-activity after administration for 1 month.Conclusion: The Co-Lingzhijiangtang Capsule may be an effective medicine to treat type Ⅱ diabetes mellitus.