Abstract: He Long was a frontier fortress areas. Its social inter-space pattern was different from that of the central plains but is difficult to discern how the sense of frontier fortress, to surround and protect the central area, influenced the people’s thoughts about social inter-space patterns. Rsearching the historical materials of geo-political significance the author has found that so-called concept of “geo-political”(xingsheng)actually was an evaluation of regional political and geographic environment. The part of He Long located in the Northwest frontier fortress surrounded and protected the central area and showed outstanding feature in layered structure. That is, such layered surrounding and protecting thought not only influenced the sense of frontier fortress strategic pattern but also made up the inter-space of frontier fortress politics, economy and culture.