In general, anal fistula wounds are relatively deep, mostly deep to the muscle layer, anal fistula wound healing can be divided into necrotic shedding period, granulation filling period, skin healing period and other three stages. 1. necrotic shedding period: in the anal fistula surgery may be used in the electric knife and other medical equipment, may cause local thermal damage in the incision, in the postoperative period of about a week the damaged tissue will gradually necrotic shedding. 2. granulation filling period: about two weeks after the operation belongs to the rapid growth period of the wound, the tissue in the incision will grow rapidly, the incision will grow rapidly from the bottom of the fresh granulation, until the whole incision is filled. 3. skin healing period: in the skin healing period, the skin healing process, granulation will fill the incision, while the skin around the anal wound will gradually heal, the skin will gradually recover. It is recommended that after anal fistula surgery patients should pay attention to the wound care, keep the skin around the affected area clean and dry, pay attention to the observation of the wound recovery in life, regular medical follow-up, in order to understand the healing situation of the incision, to prevent pseudo-healing.