At present, the medical profession is generally agreed that obesity will bring many hidden dangers that are not conducive to health, of which, diabetes, hypertension, hyperlipidemia, cerebral atherosclerosis is one of the representative “health killers”. Related information shows that the prevalence of diabetes in men with thick waists can be as high as four times that of men with normal waist circumference. On the other hand, in type 2 diabetic patients, 80% are waist circumference exceeds the standard. Moreover, the longer the excess time, the greater the chance of developing diabetes. If men between the ages of 20-30 years waist circumference thickening, the incidence of hypertension than the same age waist circumference of normal people 1 times higher; 40-50 years waist circumference thickening, the incidence of hypertension than the same age waist circumference of normal people 50% higher, which proves that the larger the waist circumference more likely to suffer from hypertension, obesity and hypertension are closely related. The incidence of angina pectoris and sudden death in obese people is four times higher than that in people with normal waist circumference. And some scholars propose that waist circumference more than 30% of the standard waist circumference, the chance of coronary heart disease within 10 years is greatly increased. For obese people, the effect of diet and exercise is often not very effective, and the long-term efficiency is less than 5%, especially when the body mass index exceeds 35, conventional diet control and exercise to lose weight is no longer suitable – because such people are often accompanied by metabolic diseases, and because overweight causes greater pressure on the joints and heart, exercise is prone to greater health risks. As a result, weight loss surgery has gradually become popular in China over the past few years. In fact, the history of bariatric surgery has been developed for 60 years and is a very mature technology. Currently, the medical community has accepted bariatric surgery as an important treatment tool to solve the problem of obesity, which has been affirmed by the consensus of various societies, statements and clinical guidelines. Surgery reduces the volume of the stomach to decrease the secretion of the gastric hunger hormone (ghrelin), dramatically reducing hunger to lose weight. The surgery is simpler, safer and has a low percentage of complications, while not interfering with food absorption, and there are no sequelae of calcium, iron, vitamins, anemia and osteoporosis in the long term, and the surgery can reduce excess body weight. To achieve a low-risk, high-safety procedure, it is necessary to choose a hospital and doctor with more advanced technology and sufficient experience.