Difficulty in defecation of rectal cancer patients after surgery can be attributed to the following reasons: firstly, gastrointestinal dysperistalsis or gastroparesis or intestinal paralysis after surgery. In this case, physical therapy, local massage, acupuncture and moxibustion can be used to stimulate intestinal peristalsis; intravenous erythromycin and water-soluble vitamins can promote the recovery of intestinal peristalsis. Secondly, after the surgery, the complication of anastomotic stenosis or anastomotic obstruction is also prone to defecation difficulties, which should be promptly carried out colonoscopy or barium enema angiography, and local dilatation or stent implantation is also needed if necessary. In severe cases, surgery can also be chosen again, and should pay attention to the diet structure, not overeating.