If the anastomosis does not grow firmly after surgery, it will cause gastric and intestinal fluids to leak into the abdominal cavity and cause serious infection in the abdominal cavity, which will cause systemic inflammatory response syndrome and even endanger the patient’s life; 2. Adhesive intestinal obstruction: after surgery, it will cause local tissue adhesions and cause adhesive intestinal obstruction, and the patient will have a significant feeling of fullness and distension after eating, as well as nausea, vomiting, anal cessation of exhaustion, defecation and other manifestations of intestinal obstruction; 3. Decreased function: After surgery, there will be a decrease in the function of digesting food and cause low protein malnutrition, even anemia and weight loss and other clinical symptoms.