Objective:To observe the effect of treatment of eliminating dampness with aromatics on damp-pathogen syndrome in impaired glucose tolerance（IGT）.Method:Patients were randomly assigned to two groups.All were treated with diet controlling

exercise treatment and diabetes millitus knowledge education.The 40 patients in the treatment group were treated by treatment of eliminating dampness with aromatics and the 40 patients in the control group were given metformin hydrochloride enteric-coated tablets.All for 6 months.Before and after treatment

fastig plasma glucose（FPG）

two hour plasma glucose（2 h PG）

fasting insulin（FINS）

blood fat of all the patients were detected

HOMA-IR was calculated.Result: All patients were treated 6 months later

at the effect decreasing blood glucose

the total effective rate were 87.5% in the treatment group.the total effective rate were 85% in the control group

they were the same effect.Before and after treatment

no significant differences were found between the two groups at BMI and blood lipid level.The two groups had obvious function of decreasing blood glucose.In addition

there was better function of improving clinic symptom and insulin resistance in the treatment group.Conclusion:The Chinese herbal medicine of eliminating dampness with aromatics on damp-pathogen syndrome in IGT can obviously enhance the insulin sensitivity.It can also to reverse IGT.