The geographical situation of the Liao Dynasty was marked by vast dimensions and complicated territorial conditions. This complexity was reflected by the fact that the Liao Dynasty not only needed to oppose the powerful Northern Song Dynasty, but also had to deal with rebels of inter-nal vassal states or tribes. This geographical pre-dicament strongly seemed to favor the arrangement of a marriage relationship for peace between the Li-ao Dynasty and other powerful states. Geographically, the Xixia Regime bordered ( i ) on the Liao Dynasty in the northeast and north, ( ii) on the Northern Song Dynasty in the southeast and south, ( iii) on various tribes of the Tubo Regime and the Huangtou Huihu in the southwest, ( iv) and on Xizhou Huihu in the west and northwest. Therefore the Xixia Regime could be easily attacked by other powers, especially the Northern Song and the Liao Dynasties. Therefore, the arrangement of a marriage for peace with the Liao Dynasty also seemed to be an inevitable stra-tegic choice for the Xixia Regime. Although there were many reasons for arran-ging a marriage for peace between the Liao Dynasty and the Xixia Regime, safety and national interests always were the main considerations for these two regimes. Relying on research on basic historical materials and on earlier scholarly work, this article focuses on geographical safety as the main area of research, and on the arrangement of marriage for peace between the Liao Dynasty and the Xixia Re-gime as a specific reference. The article also con-ducts a study on the interactive relationships be-tween the Liao, Song and Xixia dynasties as part of the history of ethnic relations in ancient China. The article also aims to find relationship patterns by researching natural human correlations due to shared geographical space. This article finally no-tices that although geographical safety did not seem to be the decisive factor for arranging a marriage for peace between the Liao dynasty and the Xixia regime, it did play an important yet subtle role in forging the period ‘complicated geographical net-work of relationships ’ between the Liao, Song, and Xixia dynasties.