目的　探讨高位J钩牵引在方丝弓矫治技术治疗安氏II类I分类错牙合中的作用。方法　临床评价 7例安氏II类I分类错牙合患者应用高位J钩牵引的疗效 ,并作X线头影测量分析。结果　高位J钩牵引能有效地牵引尖牙 ,内收前牙和保护支抗 ,抑制上颌前下方生长和控制下颌旋转。结论　J钩牵引能有效地配合治疗安氏II类I分类错牙合 ,其力系尤其对改善异常生长型有利 Objective To explore the role of high J-hook traction in the treatment of Class Ⅱ division I malocclusion with square arch appliance. Methods Seven patients with Class II malocclusion of Class I malocclusion were evaluated clinically by using high J-hook traction and analyzed by X-ray. Results High J hook traction can effectively pull the canines, adduce the anterior teeth and protect the support, inhibit the maxillary anterior lower growth and control the mandibular rotation. Conclusion J-hook traction can effectively cooperate with treatment of Class II malocclusion, and its force system is especially beneficial to improve the abnormal growth type