Polycystic ovary syndrome in the clinical treatment principle is based on the following points: 1, if the androgen is high, the clinic needs to lower the androgen treatment, commonly used is Daying-35, it takes 3-6 months to make the androgen drop to normal; 2, according to the specific situation of the patient, if the plan is to get pregnant, after the androgen drops to normal, ovulation promotion treatment can be given. And in the process of ovulation promotion, ultrasound must be used to monitor the growth of follicles and guide coitus; 3, if there is no clinical requirement for fertility, artificial cycle treatment should be done, or progesterone should be used every month to make the menstruation come every month, so that the endometrium will be cyclically shed, and it will not lead to the possibility of endometrial lesions. This is the principle of treatment of polycystic ovary syndrome, in the clinic.