安史叛軍兩次從河北道進入河南道，甚至占領京畿道的長安，都是利用便捷的官方驛道，並快速的攻占各地的中心地城市，企圖達到全面占領的目的。潼關之敗後，玄宗轉進四川，肅宗自立於靈武，開啓了對叛軍由圍堵轉向攻擊的新局。肅宗所倚賴的主力部隊，也是平亂的大功臣就是朔方軍。本文以朔方軍的平亂動線，由叛亂初起至平定叛亂，分階段的敘述其行軍動線，用以觀察整體安史之亂局勢變動的過程，及唐中央面對動亂的各種政治思考。高鳥盡，良弓藏，朔方軍最終的結果似乎已為人所淡忘。

The army of An-Shih Rebellion entered Honan-Dou through Ho-bei Dou twice, even occupied Chang-An. They used the official post road, and quickly occupied the center of the city to achieve the purpose of full occupation. After the defeat Tung-Guan, T’ang Shuan-tsung retreated to Su-Chuan. Then T’ang Su-tsung was independent in Ling-Wu and created the situation that T’ang central government stopped the way of passive resistance turned to attack the army of An-Shih Rebellion aggressively. The army that Su-tsung relied on named Shuo-Fang army that defeated the army of An-Shih Rebellion. This paper discusses the military route of the Shuo-Fang army during the different phase in order to realize the various political considerations of the T’ang central government since faced the instability situations that An-Shih Rebellion had made.