To study the clinical curative effects of Shenling Baizhu powder to treat patients with abnormal glucose tolerance. Methods： Eighty two patients with abnormal glucose tolerance were randomly separated into control group and intervention group. Patients in the control group were given guidance of diets and exercises and the intervention group extra applied shenling baizhu powder. Before and after continuous treatment for 24 weeks， the levels of FPG， 2 hPG FINS， HbA1C， TC， TG， HDL and LDL were detected. Results： After 24 weeks of treatment， 21 out of 43 cases (48.8%) were cured in the intervention group and the total effective rate was 79.1%； while in the control group only 6 out of 39 patients (15.4%) were cured， and the total effective rate was 53.8%，which was lower than the intervention group and the total effective rate difference was statistically significant (χ2=5.892，P=0.015). Conclusion： Shenling baizhu powder can effectively control the progress of abnormal glucose tolerance limit， which reflects the significance of Chinese traditional medicine theory of "treat pre-disease" in the clinical practice.