History Treatment features: A. male, 2 hours post-traumatic acetabular central dislocation this month, was admitted with supracondylar bone traction of the femur and observed for condition. The following day, a trial repositioning was performed under anesthesia, and the repositioning method used multi-directional traction. The resetting was successful. Bone traction was continued for 1 week and then surgical treatment was performed. Preoperative CT diagnosis of transverse acetabular with posterior wall fracture and 6-8 CM posterior lateral separation defect of the acetabulum, intraoperative K-L approach was used to reset the posterior column and posterior wall with the anterior acetabular wall with special tools for the acetabulum, intraoperative acetabular repositioning was very satisfactory. b. Experience: 1. central dislocation of the acetabulum is reported in the literature to be difficult to reposition, 2. preoperative repositioning helps the surgical approach to simple treatment, 3. CT diagnosis is clearer to determine the treatment plan 4, early resetting can also reduce postoperative complications. 5, never dared to try manual resetting in the treatment of central acetabular dislocation in the past, which should be of great help in future work.