373 adult cases with type Ⅱ diabetes mellitus were treated with, Shenqi Jiung Tang (SJT) Tablet and 108 cases with phenformin as control. The result showed that the symptoms were remarkably alleviated after treatment with SJT tablet. Blood glucose was decreased by 94.36%; 24-hour urine sugar was decreased by 85.79% the total effective rate was 83.16%. The effect was significantly better than that of control group (p