Gastric bypass surgery can cure type 2 diabetes, and the insulin resistance of patients disappears after surgery. Moreover, the way of food flowing after operation can also promote insulin secretion in patients and restore insulin function. Diabetes was cured. The operation of gastric bypass has less trauma and lower risk, and most of the blood sugar returns to normal after operation. The cost of the operation varies from person to person, so it is best to choose a regular hospital for this operation.