After drainage of perianal abscess alone, most will form anal fistula; if the drainage of perianal abscess at the same time hanging line therapy, will reduce the occurrence of anal fistula. Perianal abscess, refers to acute purulent infection of the soft tissues of the rectal perianal area or its surrounding interstitial space, forming an abscess. The treatment of this disease is based on incision and drainage of the abscess, and the surgical method varies according to the location of the abscess, in which the pelvic rectal space abscess is incised and drained, and the incision through the rectal wall is likely to cause sphincter external anal fistula. In order to avoid, reduce the occurrence of anal fistula, usually in the abscess after incision to find the inner mouth, and then cut the skin after hanging line, so that the abscess is completely open, not only drainage is more smooth, but also to avoid the second anal fistula surgical treatment. So in the clinical, do abscess incision and drainage, at the same time, hanging line therapy, very widely used, the success rate of the operation is very high. If there is a need for perianal abscess drainage, it is recommended to be carried out under the guidance of a professional doctor in a regular hospital to avoid delays.