After rectal cancer surgery, it is necessary to hang the bag, but the time and requirement of hanging the bag are related to the specific surgical procedures, which are divided into anal preservation surgery and total anal excision surgery, and the specific time of hanging the bag needs to be clarified under the guidance of doctors. At present, rectal cancer clinically includes anal preservation surgery and total anal excision surgery. After anal preservation surgery, it is necessary to hang the bag for more than half a year, in order to ensure the recovery of digestive function after surgery, so that the intestines can get rest and ensure the prognosis of the surgery. After anal excision surgery, the patient needs to hang the bag for life, because he/she loses the excretion function of anus, the intestines can not be anastomosed, and loses the normal physiological structure, so he/she needs to hang the bag for excretion of secretion. The choice of surgery for rectal cancer is related to the patient’s stage and typing of rectal cancer, so it is necessary to complete the relevant examination, choose the most suitable surgery under the guidance of doctor, and actively treat the disease to ensure the prognosis.