RACKGROUND: The main aim for treatment of fracture of patella is to restore contnuity of knee joint extension apparatus and anatomic reduction of knee joint, avoid occurrence of traumatic arthritis. Problems in treatment of old comminuted fracture of patella are the same with fresh fracture that has been agreed on in recenl years. Except serious comminuted fracture of patella can t be reserved, removal of patella shouldn t be performed to others. Orthopaedics Hospital of Shenyang city thinks that the ideal method is relax of knee extension apparatus, reduction of fracture, strong intal fixation and early postoperative function exercises.