The time for anal fistula surgery is not fixed, and is directly related to the type and complexity of the fistula. Specifically as follows: 1, low simple anal fistula: fistula is very clear, you can quickly explore the fistula and the internal opening in the operation, the fistula incision or excision surgery, the operation is also very simple, so the duration is relatively short, usually within half an hour to complete the operation. 2, high anal fistula or high complex anal fistula: due to the presence of multiple fistulas, multiple external and even multiple internal openings. So its operation time will be extended, will be more than half an hour, or even need more than 1-2 hours. Patients with anal fistula need to go to the hospital in time and undergo surgical treatment, because anal fistula can not be cured by itself.