Gastrectomy is a surgical operation in which the stomach is partially resected, mostly resected, or completely resected. If the patient needs the above treatment, it is recommended to consult with the gastroenterology outpatient clinic of the hospital and dispose of it under the proper guidance of the doctor. 1. Partial gastrectomy: Generally, part of the greater curvature side of the stomach is resected, also called sleeve gastrectomy, which is mainly applicable to weight loss surgery in gastrointestinal surgery. 2. Gastric major resection: generally refers to the removal of two-thirds of the body of the stomach, retaining only one-third, applicable to gastric ulcer, gastric perforation, duodenal ulcer and other surgical treatments. 3. Total gastrectomy: generally refers to the total removal of the stomach, and is mainly applicable to the surgical treatment of huge tumors in the stomach body.