The main post-operative care of anal fistula includes the following points: 1, diet, avoid smoking, alcohol, chili, barbecue, eat more green vegetables, fruits and other laxative food to keep the bowels open; 2, maintain anal hygiene, if the anus can not maintain hygiene, prone to infection, there may be a recurrence of anal fistula or prolonged healing time. The patient can be given a warm salt water or potassium permanganate bath to disinfect the anus after a bowel movement and keep the anus dry; 3, infrared physiotherapy or air dryer; 4, anal exercise to promote anal blood circulation.