Patients who underwent anal preservation surgery for rectal cancer often have different degrees of diarrhea, constipation, fecal incontinence and post-operative heaviness within 6 months after surgery due to the removal of most of the rectum, especially the rectal potbelly, and the transection of the nerves present in the rectum, as well as the impact of the surgical operation on the anal sphincter, resulting in a short period of dysfunction of the anal sphincter. Within 6 months after surgery, there are often different degrees of diarrhea, constipation, incontinence, and urgency, etc.; some patients still have these problems even 1 year after surgery. The occurrence of this situation not only greatly reduces the quality of life of patients, but also easily leads to embarrassment, embarrassment, depression and other adverse psychological effects. For this situation, in conjunction with dietary adjustment, medication and warm water bath, strengthening the exercise of anal function is a simple and effective natural therapy. 1, diet adjustment: choose to eat high protein, high calorie, high vitamin, easy to digest with the right amount of fiber, light soft food. Constipation can add honey or sesame oil in the food, drink more water, avoid spicy stimulation, dry and hard, coarse fiber food and beans, garlic, dairy and other easy to produce gas food. 2, drug treatment: for the number of stools more than 10 times a day and the stool is not shaped patients can take oral compound phenylephrine or loperamide (easy to stop) as appropriate until the stool is shaped, or stool control below 3 times a day can be discontinued. 3, warm water or 1/5000 potassium permanganate solution sitz bath: 1 ~ 2 times a day, 15 ~ 20 minutes each time; can reduce inflammation and edema in the anal area, and promote the recovery of anal contraction function and defecation reflex. But pay attention to the sitz bath can not take a long time squatting position, so as not to increase the abdominal pressure and anastomotic tension, increasing the occurrence of anastomotic complications. 4, anal function exercise: Not only is it beneficial to the recovery of anal function after surgery, but it can also promote local blood circulation, reduce stasis and expansion of hemorrhoidal veins, and treat and prevent hemorrhoids. It should be noted that when doing anal function exercise, both persistent and not in a hurry, causing excessive fatigue, to feel comfortable. The method is as follows: lean your legs together and tighten your buttocks in the direction of the anus, and under deep breathing, do anal lifting and anal closure (anal clamping) exercises; repeat these exercises 20 to 30 times, once every 3 to 4 hours; standing, sitting and lying down exercises are all acceptable. For weak patients, the number of exercises can be reduced according to the situation.