剑门关位于“黄鹤之飞尚不得过,猿猱欲渡愁攀援”(李白诗《蜀道难》)的高山峻岭地带。这里的大剑山横亘两百公平,七十二峰如锯齿般刺向云天,中断处两峰相峙,如剑之直,如门之辟,故曰剑门。四川古有“四塞之国”之称,只有两门(剑门、夔门)可通中原,欲取蜀者必攻取剑门,欲据蜀者必保住 Jianmen Gate is located in the “Yellow Crane fly can not be too, ape 猱 want to cross-anxious climbing” (Li Bai poem, “Shu Road difficult”) mountains. Here Jianjian Mountain spans two hundred fair, seventy-two peaks such as serrated stab the sky, interrupted at the two peaks phase Zhi, such as the sword straight, as the door of the provision, it said Jianmen. There are only two doors (Jianmen, Xuanmen) that can pass through the Central Plains, and those who want to take the Shu who will take the sword door, according to which people in Sichuan must keep