Gastrectomy is a surgical procedure that is mainly indicated for perforated ulcers, ulcers complicated with hemorrhage, pyloric obstruction, and those with a clear diagnosis of ulcer cancer. 1. diffuse peritonitis caused by acute perforation of peptic ulcer. 2. acute hemorrhage of ulcer or repeated life-threatening vomiting of blood. 3. Complicated pyloric obstruction seriously affecting eating. 4. Years of recurring ulcer disease with gradual aggravation and intense symptoms, and after further examination, cancer was clearly diagnosed to have occurred. 5. If the effect of internal medicine treatment is unsatisfactory, the operation can be performed. Gastrectomy can be performed in all of the above cases. Gastrectomy is an operation that has a great influence on the quality of survival of the body, and it must be considered comprehensively before the operation, and it is not recommended to perform gastrectomy if it is not necessary, and the operation must be carried out by specialized doctors.