The so-called staged surgery refers to the fact that one operation cannot achieve satisfactory results, and staged surgery is used in order to avoid or reduce the occurrence of postoperative complications, so as to achieve satisfactory therapeutic effects, which is mainly seen in colon or rectal tumors in clinical practice. Usually, there are two kinds of cases: First, acute intestinal obstruction caused by rectal or colonic tumors, which cannot be relieved by conservative treatment, the first surgery adopts tumor resection with colostomy, and then colostomy is carried out after the nutritional status of the patient recovers in about three months. Second, the rectal tumor location is too low, anastomosis of colon and anal canal, postoperative prophylactic terminal ileostomy to avoid anastomotic fistula, the stoma can be seen within one to three months after surgery, mainly to avoid the anastomotic fistula caused by colonic and rectal anastomosis, which causes serious complications, even infectious shock.