Clinicians have observed that gastric bypass bariatric surgery can significantly improve glycemic control in obese patients with type 2 diabetes and may even result in “remission” of diabetes in some diabetic patients. Reports from China show that diabetes remission rates of up to 73.5% were achieved 1 year after surgery. There are several clinical evidences that surgery is more effective in reducing weight and improving blood glucose than intensive lifestyle interventions and glucose-lowering medications, and at the same time, it can provide comprehensive control of metabolic indicators such as blood lipids and blood pressure, therefore, bariatric surgery has been renamed as metabolic surgery. In 2009, the ADA officially listed metabolic surgery as one of the measures for the treatment of obesity with type 2 diabetes in the guidelines for the treatment of type 2 diabetes. In 2011, the International Diabetes Federation also issued a position statement formally recognizing metabolic surgery as a treatment for type 2 diabetes with obesity. In 2011, the CDS and the Chinese Society of Medical Surgery also reached a consensus on metabolic surgery for the treatment of type 2 diabetes, recognizing metabolic surgery as a means of treating type 2 diabetes with obesity and encouraging medical-surgical cooperation in the management of patients with type 2 diabetes who undergo metabolic surgery. diabetes patients. In 2016, the International Diabetes Organization issued a joint statement in which metabolic surgery was included in the clinical treatment pathway for type 2 diabetes for the first time. Principle of gastric bypass surgery for diabetes: The reason why the surgery is a one-time treatment for diabetes and a clinical cure is because the unique feature of gastric bypass surgery is that it changes the physiological flow of food, which is accomplished through steps such as gastric block, gastrointestinal anastomosis and enteroenteric anastomosis. After the surgery, the insulin resistance in the patient’s body is eliminated, and the way the food flows through after the surgery also promotes insulin secretion in the patient’s body, reduces apoptosis and proliferation of islet cells, restores islet function, and cures diabetes.