It is understood that laparoscopic bariatric surgery involves making several small holes in the abdominal wall and removing part of the stomach with special instruments under laparoscopic guidance to reduce the volume of the stomach. Bariatric surgery usually allows patients to lose weight while curing other diseases associated with obesity, such as diabetes, hypertension, sleep apnea, and menstrual disorders. The results of numerous studies have shown that laparoscopic bariatric surgery not only reduces weight, but also has excellent results in polycystic ovary syndrome with obesity. In many people who have not had menstruation for a long time, weight loss surgery can restore ovarian ovulation, thus normalizing menstruation and achieving normal pregnancy. Since 2012, we have completed laparoscopic gastric sleeve resection weight loss surgery in more than 70 cases with polycystic ovary syndrome, and most of them have normalized their menstruation after weight loss surgery, and many of them have become pregnant or given birth. Why bariatric surgery can cure polycystic ovary syndrome at the same time is still being further explored. The short-term return of menstruation in patients after weight loss surgery is clearly not only due to weight loss. It may be the result of surgery-induced changes in the digestive tract that lead to the restoration of hormonal balance and the decline of androgenic testosterone to normal. Patients with polycystic ovary syndrome should first be seen by a specialist in obstetrics and gynecology. If good results are not obtained after regular treatment and weight is difficult to control, surgical treatment for weight loss should be considered. At present, the surgical treatment of obesity not only refers to the weight, but also requires a decision based on the metabolic syndrome accompanying obesity. Experts also said that there is no unified opinion on the weight requirement for obesity with polycystic ovary syndrome. As with weight loss surgery for type 2 diabetes, weight loss surgery will have better results for polycystic ovary syndrome with some degree of obesity.