As the weight loss army continues to experiment with various weight loss methods, weight loss surgery has also begun to gradually become known. After 70 years of development, it has become a mature, routine and safe treatment method, and is considered by the medical community to be the only long-term effective treatment for obesity. Many fat and sugar lovers ask what is the main mechanism of bariatric and diabetic surgery for the treatment of obesity and type 2 diabetes and why it can be effective. In more than 1,500 clinical cases in the Bariatric and Diabetic Surgery Center, fat people have effectively lost 50% to 60% of their excess weight within one year after bariatric surgery, which is an effect that cannot be achieved by medical bariatric methods. In some cases, after the bariatric surgery, the sugar patients gradually got rid of the bottles and jars of hypoglycemic drugs, and their blood sugar returned to normal, which effectively relieved the complications brought by diabetes. So what is the main mechanism of weight loss surgery treatment? The main mechanisms are as follows I. Reduce the intake and absorption of food, thus reducing the energy intake and the load of sugar metabolism. As we all know, people are fat because of the excessive intake of food. When the energy intake exceeds our body’s demand, it will be converted into fat in the body, so people become fat. But when you have weight loss surgery, you will restrict from eating too much, and naturally you will not have too much energy in your body. Naturally, you will lose weight. Second, reduce the weight of sugar fat friends, reduce insulin resistance caused by the accumulation of fat due to simple obesity. Third, the gastrointestinal tract reconstruction changes the secretion of hormones in the intestine-islet axis, thus improving glucose metabolism. Fourth, it changes the intestinal flora and directly reduces blood sugar. The change of intestinal bacteria ecology by weight loss surgery is positive, and the intestinal ecology after surgery is more diverse and healthy, and the surgery reshapes the patient’s gastrointestinal oasis forest. Such results, in turn, contribute to disease remission after surgery, such as cured diabetes, normalization of hypertension and hyperlipidemia, and even a decrease in cancer incidence.