For diabetics, every detail of life is inseparable from sugar control. There are two main ways to control blood sugar, one is to actively reduce sugar intake, and the other is to strengthen the body’s sugar metabolism function. To reduce sugar intake mainly lies in the control of diet, diabetic patients need to maintain a long-term light-based food in order to avoid high blood sugar. The traditional method of strengthening the body’s sugar metabolism function is mainly shown in taking hypoglycemic drugs and insulin injections, which can quickly achieve the effect of blood sugar control, but basically need to be used for life. In fact, the insulin function of type 2 diabetic patients is not yet completely absent, and as long as the insulin function can be restored to normal operation, the effect of long-term treatment of diabetes can be achieved, and there is no need to resort to external substances to improve glucose metabolism. Today, the mechanism of gastric bypass surgery to treat diabetes is to solve the problem at the source. Type 2 diabetes caused by severe obesity is mostly due to insulin resistance caused by abdominal obesity, and one of the effects of this surgery is to limit food consumption and reduce nutrient absorption by creating a small gastric sac and reconstructing the digestive tract to achieve weight loss. In addition, the procedure also alters the secretion of hormones in the intestinal-islet axis during the reconstruction of the digestive tract, further improving glucose metabolism. Gastric bypass surgery has been proven to treat diabetes for more than 60 years, and the operation has been improved with the advancement of technology and is now at a very mature stage. However, because of the difficulty of gastric bypass surgery, not many medical institutions in China are able to perform this procedure well.