An anal fistula is a granulomatous tube around the anal canal with intermittent presence of inflammatory infection. Anal fistula is a secretion flow around the anus, most of the anal fistula from the rectum perianal abscess and lead to the occurrence of granulomatous tubes generated around the anal canal, fistula drainage is smooth, the patient usually do not have obvious pain, with the further progression of the disease, this part of the recurring pus outflow, there is secretion outflow or pain symptoms there is inflammation. Surgery is the main means of treatment of anal fistula, the use of surgery to remove the lesion and drainage, to reduce the anal sphincter injury, is conducive to the protection of the function of the anus. Surgical options include fistulotomy, hanging wire therapy, and anal fistulotomy. Found anal fistula, it is recommended to consult the regular hospital anorectal department, as soon as possible to give surgical treatment, to avoid aggravation of the condition.