Surgery is still necessary after 30 years of anal fistula. Anal fistula for 30 years persists, the internal opening of the fistula continues to enter the pathogenic bacteria, often leading to fistula attacks, long-term inflammatory stimulation, may cause malignant changes in the perianal sphincter and skin tissues, the potential risk of cancer, so it is necessary to do surgery. The specific surgery should also be combined with the type of fistula, if it is simple low anal fistula, as long as the fistula fistulotomy or fistula fistulotomy can be performed. If it is a simple high anal fistula, you need to hang the line to prevent postoperative anal incontinence. For complex anal fistula need to be specifically combined with the fistula walk, and then take the appropriate treatment. Patients with fistula for 30 years should go to the hospital in time, according to the type of fistula, by the doctor’s judgment to make the appropriate surgical treatment.