After circumcision with potassium permanganate, can play a role in disinfection and sterilization, to prevent the emergence of postoperative infection. After the circumcision, due to the existence of surgical incisions may be infected, at this time the use of low concentration of potassium permanganate solution for rinsing, can play a disinfecting and sterilizing effect, to avoid the emergence of post-surgical infection, is conducive to promoting wound healing. In the postoperative period, we should also do a good job in other aspects of the physical, avoid strenuous exercise, do not have sex, to prevent repeated penile erection, light diet, and do not drink alcohol and smoke. When using potassium permanganate, must follow the doctor’s guidance, safe and reasonable use.