Gastric volume reduction surgery is a kind of slimming surgery specially for diabetes, which only takes about 1 hour, and has the advantages of less trauma, quick recovery and low risk. Stomach reduction and intestinal bypass surgery is a sleeve gastrectomy. After gastrectomy, the secretion of ghrelin can be reduced, thus achieving the effect of alleviating hunger. Intestinal bypass can reduce the absorption of sugar and fat, shorten the path of food from the stomach to the end of the small intestine, and avoid stimulating the secretion of intestinal hormones, thus promoting the return of pancreatic function to normal and inhibiting the rise of blood sugar. At the same time, the direction of food flow is changed, and the absorption of nutrients by human body is changed by shunting, so as to improve or cure obesity and avoid obesity from bringing greater harm to your life and health. Shunt the upper part of the stomach, rearrange the position of the small intestine, reduce the food intake and heat absorption of the small intestine, so as to achieve the effect of weight loss and diabetes mellitus surgery.