On the twenty-first day of anal fistula surgery, the body is basically recovered, normal diet can be, it is recommended to eat more high-protein foods, more fresh vegetables and fruits. 1. Eat more high-protein foods, such as fish, beef, lamb, chicken, etc., these foods have a greater benefit to the body’s recovery, avoid spicy, stimulating food and cold and cold food, or easy to cause inflammatory reaction of the anal fistula surgery wound. 2. Eat more fresh vegetables and fruits: these foods are rich in dietary fiber and a variety of vitamins, both nutritious to promote wound healing, but also soften the stool to facilitate defecation, to protect the postoperative healing period of the wound. Especially if the stool is dry and difficult to defecate, it will cause the anal fistula surgery wound tearing causing bleeding, pain or secondary infection. After anal fistula surgery, it is recommended to carry out treatment scientifically under the guidance of the doctor, and do a good job of postoperative care, dressing change and so on. Usually pay attention to do a good job of conditioning measures, regularly go to the hospital for review, there are abnormalities in a timely manner to avoid aggravation of the condition.