目的　探讨环状韧带成形术治疗儿童陈旧孟氏骨折的疗效。方法　将前壁伸肌腱附丽从肱骨外髁处剥下充分暴露肘关节前外侧关节囊。在桡骨头复位后 ,将肱骨小头前方关节囊做瓣式转移 ,修补桡骨头前方关节囊及环状韧带缺损区。桡骨头将被稳固地维持在良好的位置上。结果　 5例病人术后随诊 6～ 8个月 ,肘关节屈伸及旋转活动良好 ,无肘内外翻畸形及侧方不稳定。结论　采用环状韧带成形术治疗儿童陈旧孟氏骨折疗效可靠 Objective To investigate the effect of circumferential ligamentoplasty in the treatment of old Monteggia fractures in children. Methods The extensor tendons attached to the anterior wall of the humerus were dissected from the lateral condyle to fully expose the anterolateral joint capsule of the elbow. In the radial head reset, the humeral head in front of the articular capsule do flap transfer, repair radial head anterior capsule and annulus ligament defect area. Radial head will be firmly maintained in good position. Results Five patients were followed up for 6-8 months. The flexion and extension activities of the elbow joint were good. No elbow valgus deformity and lateral instability were observed. Conclusion The use of annuloplasty for the treatment of children with old Monteggia fracture is reliable