Flatulence after rectal cancer surgery depends on when the flatulence occurs. If flatulence occurs within 1-3 days after surgery, it may be that the intestinal function has not yet recovered, and the flatulence at this time can be recovered by taking oral medicines to promote intestinal peristalsis to promote the recovery of intestinal function at an early stage, so that the gas accumulating in it can be eliminated, and the patient can have an early diet and recover at an early stage. If the flatulence occurs between 7-14 days or 7-21 days after the operation, we should consider whether it has caused intestinal obstruction, in which case we should take comprehensive treatment measures, including fasting, intravenous supplementation of nutrition and other treatments, and generally can recover slowly. If the flatulence occurs after discharge from the hospital, it is necessary to consider whether it is intestinal obstruction, which may be caused by anastomotic stenosis, and the flatulence, constipation, abdominal pain, abdominal distension, nausea, and vomiting will occur if the stool cannot be passed, in this case, the obstruction can be solved by dilatation of anus and other methods of stenosis circumcision or dilatation. If the postoperative adhesive intestinal obstruction, abdominal distension, abdominal pain, nausea, vomiting, may have to put the gastric tube for comprehensive treatment, as long as the passage is fine, if it really does not work or even the emergence of strangulation, the gradual increase in pain, fever, these cases must be timely to the hospital for surgical treatment to relieve the obstruction, or there will be a life-threatening.