Anal fistula 1cm can not distinguish between low or high, is based on the location of the fistula to determine the distinction between high and low anal fistula is to the external anal sphincter deep division, sphincter above the sphincter is high, sphincter below the sphincter is low. Anal fistula is to the external anal sphincter as the demarcation point of the high and low, is conducive to differentiation and thus different treatment modalities, for the external anal sphincter above the high level of anal fistula is mainly used to hang the line treatment, to avoid sphincter rupture leading to anal incontinence, in the low level of surgical resection. For the sphincter below the low anal fistula, the current clinical treatment with surgical resection, together with the internal and external mouth of the fistula and the fistula together, the function of the sphincter will not cause too much impact, the possibility of incontinence after surgery is small. Once found, anal fistula patients need to timely medical treatment, improve the relevant examination, clear type, under the guidance of the doctor to determine the treatment program, follow the doctor’s instructions and active treatment.