Bariatric surgery first originated in the United States and has been around for more than half a century. Bariatric surgery does work, and the results are very long-lasting and have been a boon to the majority of obese diabetic patients. Bariatric surgery for obesity, listed as one of the top ten innovative technologies in the medical field in 2013, has been widely carried out in Europe and the United States. In contrast, the gap between China and developed countries internationally is relatively large. In 2013, for example, 480,000 surgeries were performed worldwide, including 170,000 cases in the United States, while less than 3,000 cases in China. Currently, there are about 90 million obese and overweight people in China. These obese patients with a BMI of 35 or more are probably more than 20%. There are about hundreds of thousands of people suitable for surgery in the country, but there are still relatively few who actually receive surgery, and only about 0.3 percent of obese patients have undergone surgical treatment. So what does weight loss surgery include? Gastric bypass surgery is the most popular surgery in the United States. By bypassing the upper small intestine, food does not pass through the upper small intestine, because the absorption of nutrients is in the upper part of the small intestine, the absorption of nutrients is less, so that the dual effect of weight loss and treatment of diabetes is achieved. However, this surgery is more complicated and the structure of the gastrointestinal tract is more altered, so it usually requires a very mature bariatric surgery hospital to complete. Another popular procedure is “sleeve gastric surgery”, which is to cut the stomach into a narrow channel with only about 80-100 ml capacity, so that food can quickly pass through the sleeve stomach and quickly pass through the small intestine, so that the patient’s hunger will be significantly reduced and the effect is better. Diabetes and obesity are often twin brothers, which is why we have seen an exponential upward shift in the number of patients with diabetes as the standard of living has improved. Surgery is also very effective compared to the control of diabetes. An obese patient who does not yet have diabetes can reduce his risk of diabetes by 83% with bariatric surgery. For the obese diabetic patient, weight loss surgery resulted in a 75% remission rate of diabetes after 2 years. For patients with hypertension and hyperlipidemia, although its effect is not as obvious as diabetes, it is also very effective and can improve hyperlipidemia by 70%, and another 78% of patients improve their hypertension symptoms. Surgery is also one of the best treatments for patients with polycystic ovary syndrome combined with obesity. Obesity also has a great impact on the quality of sleep, and the proportion of them suffering from respiratory sleep apnea syndrome is very high. Many people will suddenly stop breathing when they sleep at night, and will wake up because of the lack of oxygen, but often many patients are not aware of it themselves, and have a feeling of suffocation after waking up, and their family members look at their faces are purple, and after pushing them awake, they are fine again. Surgery can also reduce the damage of weight on joints. Heavy people have more or less problems with their knee joints. There was once a very fat patient who went to an orthopedic surgeon who said he had to have his joints replaced, but later had bariatric surgery and lost more than 100 pounds in a year. Of course weight loss is a long-term arduous task, there are various ways to lose weight, scientific treatment of obesity is an effective means to prevent and reduce the development of obesity complications, allowing patients to return to work, regain confidence in life and improve the quality of life.