运用青藏块体东北缘与鄂尔多斯地块相互作用的“轮闸模型”的有关研究结果，结合大陆基本应力场特征，讨论了１９８９年１０月１８日大同—阳高６．１级地震发生的区域构造运动背景。初步看出，该震是在“闸”继续紧压，即鄂尔多斯地块处于相对稳定状态下发生的呼应性地震事件，在大区上它是地质块体间构造运动相互影响而表现的“西７东６”地震呼应现象。 Based on the related research results of the “wheel-brake model” on the interaction between the northeastern margin of Qinghai-Tibet block and the Ordos block and the characteristics of the basic stress field in the continent, the paper discusses the area where the Datong-Yanggao M = 6.1 earthquake occurred on October 18, 1989 Tectonic sport background. It is preliminarily shown that the earthquake is a continuous squeezing of the “gate”, that is, the echogenic earthquake occurred under the relatively stable condition of the Ordos block. In the large area, it is an expression of the mutual influence of the tectonic movement between geological blocks 7 East 6 earthquake echo phenomenon.