Sleeve gastrectomy is a gastric reduction surgery and is mainly used for the treatment of obesity. Some people who are too obese are directly related to excessive eating and excess nutrition, and these people have a relatively large amount of food and overeat every time they eat, which can be treated by sleeve gastrectomy. Sleeve gastrectomy mainly involves removing most of the gastric body from the greater curvature of the stomach. The surgery is mainly longitudinal, and after the greater curvature of the stomach is removed, the size of the stomach is reduced, while the function of the stomach is still preserved. The sleeve gastrectomy reduces the volume of the stomach so that the stomach’s capacity for food is reduced while still not interfering with the normal digestion of food. After recovery, there are usually no after-effects and the body will gradually lose weight without affecting the health and absorption of nutrients by the intestinal system.