A circumcision anastomat comprises an upper anastomat, a lower anastomat and a fastening adjusting component which are connected with one another by connecting devices. The lower circumcision anastomat is in the shape of an irregular ring, a prepuce
cutting groove is arranged on the outer wall of the circular lower anastomat, a latex pad is arranged in the prepuce
cutting groove, prepuce antislip bumps are arranged at the upper edge of the outer wall of the circular lower anastomat, a prepuce antislip strip is arranged at the lower edge of the outer wall of the circular lower anastomat, a
frenulum protecting portion is arranged at one end of an edge notch of the outer wall of the circular lower anastomat, a
frenulum positioning bump is arranged on an edge notch, which corresponds to the outer wall of the lower anastomat, of the
frenulum protecting portion, and a
cutting surface with the frenulum protecting portion and a cutting surface of a main body are not positioned on the same horizontal plane. The circumcision anastomat can be applied to patients with long or short
penis frenula under a synergistic effect of the lower anastomat, the upper anastomat, the fastening adjusting device and the connecting devices, suffering of the patients during circumcision can be thoroughly prevented, doctors can operate the circumcision anastomat easily, post-operation infection and side effects are avoided, and the circumcision anastomat is applicable to circumcision in various levels of hospitals.