Recently, the ward received several patients with postoperative recurrence of anal fistula, and from the postoperative results, there are several reasons for the patients’ reference: the surgical endoprosthesis was not handled properly, maybe the surgery was complicated, the endoprosthesis was not accurate, or there were other branches. Postoperative follow-up is not done regularly, resulting in pseudo-healing. The fistula was found to be a cystic infection with a thick wall, and the diagnosis was pre-sacral occupancy, with pathology to be examined. The first affiliated hospital of Henan College of Traditional Chinese Medicine, Anorectal Disease Treatment Center Zhou Yan Yang Therefore, if the anal fistula recurrence must be carefully examined, it is very important to find out the cause of the disease.