So far, there is no effective radical surgery for diabetes, but only through various methods such as diet, exercise and medication to control blood sugar and slow down the development of the disease; if not properly controlled, it will accelerate the arrival of diabetes complications. For some patients with short duration of diabetes and not very high overall blood glucose level, after strict control of diet and appropriate exercise, coupled with effective glucose-lowering treatment, blood glucose level will be gradually controlled to a healthy state, at which time the use of glucose-lowering drugs can be gradually reduced until they are discontinued to achieve reversal, a typical example of which is weight loss metabolic surgery for obese type 2 diabetes. Weight loss metabolic surgery is a type of gastrointestinal surgery, mostly gastric bypass surgery used to treat diabetes in China. Gastric bypass directly reduces blood glucose and insulin resistance by losing most of the excess fat, reducing food intake, improving gastrointestinal flora and hormone secretion, making it possible for the body to regulate blood glucose through its own insulin secretion again after developing diabetes. However, the reversal of diabetes is based on the control of life and eating habits, and the same is true for weight loss metabolic surgery. Patients need to follow their doctor’s and health manager’s instructions for diet and exercise after this type of surgery.