As the reflection of social history, the biographies historical records and history of Han dynasty have given quite attention to the problems of the frontier at that time, mainly lie in the following aspects: one is the concept of establishing the solid edge to keep plug; two is the battlefield performance and real records of armed forces, who fight against the war in the Han dynasty frontier fortress in the war against the Xiongnu,then they become the object of generation song to literati and poets; Three are the true description of local people and customs, natural scenery as well as war scenes of frontier fortress , which are becoming the important source materials of frontier fortress for the later literati.