安氏Ⅱ类一分类错包括有骨性错和功能性错。它们有着不同的病因机理和矫治原则，但临床对此两种错的鉴别诊断有时却是较为困难的。本实验对３０例安氏Ⅱ类一分类错患者进行了下颌运动学研究，以探讨骨性错和功能性错的下颌运动轨迹特征。结果表明，用下颌运动轨迹描记作为辅助性诊断手段，对骨性和功能性安氏Ⅱ类一分类错进行鉴别诊断具有重要的临床价值。 Class II clashes include skeletal and functional errors. They have different etiopathogenesis and treatment principles, but the clinical diagnosis of these two kinds of mistakes is sometimes more difficult. In this study, 30 cases of Class Ⅱ malocclusion patients were studied mandibular kinematics in order to explore the features of mandibular locus of skeletal and functional errors. The results show that the use of mandibular motion track records as a secondary diagnostic tool, differential diagnosis of skeletal and functional Class Ⅱ Division I has important clinical value.