Circumcision is a very common surgical procedure that is performed for medical and traditional purposes in the world. However, many technical of circumcision is needed to improve. Thus, this study introduced a novel method of circumcision that is a refined version of the sleeve technique, termed subcutaneous tissue sparing dorsal slit with new marking, and evaluated the safety and efficacy of this novel method of circumcision. The randomized clinical trial included 93 adult patients with redundant foreskin or phimosis treated from May 2015 to March 2017. Patients were randomly divided into the novel circumcision method (n = 45) or conventional dissection (n = 48). The groups were compared regarding rates of intraoperative hemorrhage, operative time, pain, healing, satisfaction with penis appearance, and relevant adverse events. No patient suffered any obvious complication. Compared with the patients given conventional dissection, the patients who underwent the new surgical device experienced significantly less wound healing time, scar width, and recovery time ( P <.05). The new method resulted in greater intraoperative bleeding volume and surgical time ( P <.05). The rate of satisfaction with appearance of the penis was significantly higher in the group treated with the novel technique. In addition, the cost of surgery of these 2 methods was similar. Based on the above research, we found that subcutaneous tissue-sparing dorsal slit with new marking technique was an effective and safe procedure for circumcision, and deserved further application in clinical practice.