Impaired glucose tolerance is a risk factor of diabetes mellitus.About 5%~10% patients of impaired glucose tolerance will deteriorate to diabetes mellitus every year.Now,there are about 40 million patients whose glucose tolerance are impared in our country.The intervention on impaired glucose tolerance to prevent or delay it to become diabetes mellitus is important to lower the morbidity of diabetes.This passage discussed the study of pathogenesis,clinic differentiation,typing and treatment of traditional Chinese medicine on impaired glucose tolerance,in order to deepen the understanding of traditional Chinese medicine on impaired glucose tolerance.