After sleeve gastrectomy, the surgeon creates a sleeve-like stomach with a capacity of 60 to 80 ml, which reduces the volume of the stomach, thus providing weight loss. Sleeve gastrectomy is a common procedure in obesity and metabolic disease surgery for the treatment of obesity and diabetes. It has been widely performed in large centers for its simplicity, accessibility, effectiveness as well as fewer complications. It can be used as a stand-alone procedure and as a one-stage weight loss procedure in patients with super obesity. The procedure involves freeing the greater curvature and fundus of the stomach, inserting a suitable type of gastric tube, and removing most of the stomach and all of the fundus on the greater curvature side of the stomach to create a sleeve-shaped stomach with a capacity of only 60-80 ml. This reduces the intake and absorption of food and reduces weight. At the same time, there are complications associated with sleeve gastrectomy: bleeding, fistula and gastroesophageal reflux (GERD), but the incidence is about 3%.