Objective:To observe the intervention effects of a traditional medical formula Jiangtangle on patients of impaired glucose tolerance（IGT）.Methods:The 124 cases which have been diagnosed impaired glucose tolerance（IGT） were randomly divided into two groups

treatment group including 64 cases and control group including 60 cases.Blood biochemical indicators of treatment group and control group were analyzed before and after treatment using paired t test;Blood biochemical between treatment group and control group indicators were analyzed using independent sample t test;the efficiency between treatment group and control group before and after treatment was compared using the rank sum test.Result: Fasting plasma glucose（FPG）

2-hour postprandial blood glucose

glycosylated hemoglobin and total cholesterol（TC）

triglyceride（TG） between treatment group and control group before and after treatment were statistically different（P < 0.05）

fasting plasma glucose（FPG）

2-hour postprandial blood glucose

glycosylated hemoglobin and total cholesterol（TC）

triglyceride（TG） treatment group and control group were statistically different（P < 0.05）

total effective rate of treatment group was 91%

that of the control group was 55%

the total effective rate between the two groups was also significant difference（P < 0.01）.Conclusion: Treatment group was superior to the control group

while Hypoglycemic music on patients with impaired glucose tolerance（IGT） has significant improvement.