Gastrectomy varies in time depending on the nature of the lesion, usually around 2 to 5 hours. Gastrectomy is a medical term which mainly includes total gastrectomy, most gastrectomy, hemigastrectomy, and sinus resection. Different surgical styles, i.e. the extent of resection, are chosen according to different diseases and conditions. In the case of a gastric ulcer, lymph node removal is usually not required and takes a relatively short time, usually around two hours. If there is a malignant tumor in the stomach, the surgical procedure performed is more complicated, requiring a more extensive resection and surrounding lymph node clearance, so it takes longer, usually four to five hours. Before the operation, you should maintain a good mental state, do not be overly nervous and anxious, pay attention to rest, and cooperate with the doctor’s and nurse’s instructions. After the operation, you should pay attention to the eating time and diet regulation, and consult your doctor in time if you feel uncomfortable during the period.