Both domestic and international guidelines advocate lifestyle interventions as the basic treatment for all polycystic ovary syndrome. The comprehensive therapy for polycystic ovary syndrome includes 3 parts: balanced diet, rational exercise and behavioral interventions, which can not only improve patients’ dietary habits, body glycolipid metabolism and body endocrine status, but also supplement micronutrients, promote metabolism, enhance immunity, reduce and maintain body mass and improve patients’ quality of life. Behavioral interventions are an important part of comprehensive treatment, including goal setting, self-monitoring, control of stimuli, improvement of problem-solving skills, continuous assessment and monitoring, and self-confidence building, which in turn optimize body mass management, sustain a healthy lifestyle, and maintain good mood. Some studies have shown that after weight loss achieved through diet plus exercise, 30% of patients with polycystic ovary syndrome combined with infertility can resume ovulation and spontaneous pregnancy. And body mass index reduction improves pregnancy outcome in patients with polycystic ovary syndrome. In addition, quitting smoking, limiting alcohol and changing sedentary lifestyle are also very important for the treatment of polycystic ovary syndrome. The probability of pregnancy in 3 months of polycystic running exists, but it is also necessary to pay attention to the balance of nutrition.