Gastric cancer duodenal cancer surgery carries out the steps of anesthesia, disinfection, opening, resection and suture. 1. Anesthesia: gastric cancer duodenal cancer surgery needs to make patients under general anesthesia, which can be general anesthesia, general anesthesia combined with nerve block and so on. 2. Sterilization: the abdomen needs to be sterilized, the scope of which is the area of 15 cm near the surgical incision, to avoid adverse consequences caused by improper sterilization. 3. Abdominal opening: generally from the upper abdomen around the umbilicus incision, and then into the abdominal cavity, to detect the location of the lesion and the relationship between the surrounding tissue, to determine whether there is a possibility of surgery. 4. Resection: The lymph nodes in the stomach and surrounding tissues are then freed, and after this, the lesion needs to be removed using a cutting closure, and then the stomach, duodenum, or (and) pancreas are anastomosed using an anastomosis to determine whether there is any bleeding. 5. Suture: after counting the surgical instruments and so on without error, finally close the incision in order. After surgery, patients with gastric cancer duodenal cancer should rest in bed, avoid strenuous exercise, keep the bowel movement smooth, eat light diet, and consult doctor in time when there is any abnormality.