利用通过本区的宽角反射／折射剖面资料对大同—阳高震区及邻区地壳上地幔速度结构与构造进行了详细的研究。结果表明，地壳上地幔速度结构与构造在纵向和横向上具有明显的不均一性。浅部基底断裂发育，对应其深部，根据波组特征、壳内界面及速度等值线起伏变化和低速异常体的边界等推测了地壳深断裂带，区内最明显的上地壳低速体位于大同—阳原附近，其南界存在地壳深断裂，大同—阳高地震群与该低速异常体和深断裂有关 The velocity structure and structure of the crust and upper mantle in Datong-Yanggao earthquake zone and its adjacent area are studied in detail by using the wide-angle reflection / refraction profile data in this area. The results show that the crust and upper mantle velocity structure and structure have obvious inhomogeneity in the longitudinal and transverse directions. According to the characteristics of the wave set, the variation of the contours of the crust, the contours of the velocity contours and the boundaries of the low-velocity anomalies, we infer the deep crustal fault zone. The most obvious upper crust low velocity body in the area is located in Datong Near the Yangyuan area, there is a deep crustal crustal fault in the southern boundary of the Datong-Yanggao earthquake swarm, which is related to the low-velocity anomalous body and deep faults