Objective： To observe the clinical effect of integrated Chinese and western medicine for polycystic ovary syndrome.M e th o d s：Divided 70 cases of patients with polycystic ovary syndrome with phlegm-dampness stagnation syndrome into the observation group and the control group randomly，35 cases in each group.The control group was given clomiphene citrate capsules for treatment，while the observation group was additionally given Cangfu Daotan tang based on the treatment of the control group.Both groups continuously received treatment for four menstrual cycles.Compared the clinical effect，levels of luteinizing hormone(LH)，follicle-stimulating hormone(FSH)and testosterone(T)in serum before and after treatment，and pregnancy of patients in a year in the two groups.Results：After treatment，the total effective rate was 94.3%in the observation group，higher than that in the control group，which was 71.4%，the difference being significant(P＜0.05).Levels of LH，FSH，T and LH/FSH in the two groups were all decreased when compared with those before treatment(P＜0.05).Levels of each hormone in the observation group were all lower than those in the control group(P＜0.05).The pregnancy rate was 88.6%in the observation group，higher that in the control group，which was 65.7%，the difference being significant(P＜0.05).Conclusion：The therapy of integrated Chinese and western medicine attaches importance to both the root cause and the symptoms in treating PCOS，which effectively improves clinical symptoms，effectively recovers hormones in body，promotes follicular development and increases the pregnancy rate of patients with obvious clinical effect.