Objective:To discuss the clinical and biochemical features of polycystic ovary syndrome with obese women of phlegm constitution  Methods:166 cases of polycystic ovary syndrome with obese women were collected, in which 43 belong to phlegm constitution group and 37 belong to tendency phlegm constitution group, 86 belong to non-phlegm constitution group; clinical and biochemical characteristics in each group were analyzed and compared  Results:①There was no statistic difference in ages, BMI,WC,HC,WHR,diastolic blood pressure during the three groups(P>0.05); the age at menarche of phlegm constitution group was significantly higher than non-phlegm constitution group and tendency phlegm constitution group(P<0.05)while diastolic blood pressure of phlegm constitution group was significantly lower than that of tendency phlegm constitution group(P<0.05). ②There was no statistic difference in sex hormone, blood glucose and blood lipid index in each group(P>0.05) but sex hormone with SHBG of phlegm constitution group was significantly higher than that of non-phlegm constitution group(P<0.05). ③There was no statistic difference in living styles such as eating snack, sweet dish, fried food and sports during the three groups(P>0.05). ④Incidence of first degree family history of TDM,hypertension,premature balding of phlegm constitution group was significantly higher than that of non-phlegm constitution group(P<0.05); Incidence of first degree family history of TDM of tendency phlegm constitution group was significantly higher than that of non-phlegm constitution group(P<0.05)  Conclusion:It was showed that the age at menarche of polycystic ovary syndrome with obese women of phlegm constitution was late, and diastolic blood pressure was low; most patients have family history of TDM, hypertension and premature balding; reproductive hormone and metabolic indices of phlegm constitution group was similar with non-phlegm constitution group but sex hormone with SHBG of phlegm constitution group was significantly higher.