Anal fistula surgery is now mostly open surgery, that is, incision and drainage, there are open wounds, large trauma, slow recovery characteristics, if the post-operative diet is better adjusted, conducive to wound recovery, as follows: 1, post-operative to light, easy to digest diet: the initial soup, milk, fluid-based; 2, high protein, high-fiber diet: fiber diet including vegetables, fruits, high protein including vegetable protein such as soybean, animal protein such as fish, meat, chicken, etc.; 3, post-surgery dietary regimen, related to the patient’s constitution: patients with constipation should take fruits with laxative effect, such as bananas, dragon fruit, kiwi, etc.; patients with diarrhea constitution should eat less greasy food and nuts that are not easy to digest, such as peanuts, walnuts, melon seeds, etc.