A regulating component of a one-time circumcising anastomat is composed of a rivet, a regulating spring, a prepuce regulating mastoid process, a prepuce incising mastoid process, a rivet channel, a spring channel, a spring seat, a rivet mastoid process seat, a regulating component wall and a rivet expanding notch. An upper anastomat is designed to be composed of two irregular semi-circle rings, one end of the upper anastomat composed of the two semi-circle rings is connected through a connection component, wherein the end of the upper anastomat is provided with a frenum, and the other end of the upper anastomat is connected through a regulating component under the action of the rivet and the regulating spring. The regulating component is placed on the outside back face of the upper anastomat provided with the two semi-circle rings, namely, the regulating component is placed on two sides of the opening end. The regulating component is provided with the regulating component wall, the rivet channel, the spring channel, the spring seat, the rivet mastoid process seat and the rivet expanding notch. The regulating component of the one-time circumcising anastomat is simple in structure, convenient to operate, the loop is incised without pain, and a patient can accept the treament easily. The regulating component of the one-time circumcising anastomat is suitable for implementing circumcision on people at different ages especially for old people, children and patients with short frenum.