Sleeve gastrectomy is a type of weight loss surgery, which has been widely practiced for its remarkable weight loss effect, simple operation and relatively few complications. Sleeve gastrectomy is one of the most commonly used weight loss surgeries, which starts from 2~6cm from the pylorus and removes most of the stomach body on the greater curvature of the stomach and completely cuts off the fundus of the stomach, finally forming a sleeve-shaped stomach on the lesser curvature of the stomach. The volume of the stomach after surgery is about 60~80ml. In terms of surgical results, the sleeve gastrectomy has a more significant weight loss effect, and the operation is simple with fewer complications, so it can be performed as a stand-alone operation or as the first stage of adjunctive treatment for super obese patients.