Objective To explore the clinical effect of arthrolysis and a hinged external fixator for treatment of posttraumatic elbow stiffness.Methods From April 2007 to April 2012,26 cases of posttraumatic elbow stiffness patients were treated with arthr o lysis and a hinged external fixator after operation,and the effect was observed.Results After operation,26 patients were followed up for 15(8-24) months,the ranges of elbow joint motion increased from (42 ± 17) ° to (119 ± 17) ° after operation.There was significant difference (t =152.85,P＜ 0.05).The MEPS scores increased from (36 ± 13) points to (82 ± 14) points after operation,15 cases were excellent,5 cases were good,3 cases were fair and 3 cases were poor,the rate of excellent and good cases was 76.9％ (20/26).Twenty-three cases (88.5％,23/26)elbow function improved.Postoperative infective complication occurred in 1 case,postponed incision healing occurred in 1 case and 1 patient had cubital nerve paralysis,the symptom disappeared after 3 months and the patient showed no instability in elbow joint.Conclusion Arthrolysis and a hinged external fixator can deep stabe the elbow and its specific position,allowing early rehabilitation to promote functional recover of the elbow.