陕西诸道行御史台设立于元世祖至元年间,从至元二十七年到延祐二年,历时二十六年,行台三废四设,如此频繁的废设必有其原因。本文第一部分叙述了陕西行台的设废过程;第二部分从地理角度论证了西部地区设立行御史台的必要性;第三部分探讨了江南行台对西台的影响;第四部分则指出了陕西行台设立的必然性。 The Royal Roads of Shaanxi Duxingxu were established in the first year of the Yuan Dynasty ancestors, from Yuan twenty-seven years to Yan you two years, which lasted twenty-six years, Taiwan set three wastes four, so frequent disuse must have its reasons. The first part of this article describes the process of setting up and abolishing waste in Shaanxi Province. The second part demonstrates the necessity of setting up a bar in the western region from a geographical point of view. The third part examines the impact of the southern route on the Taiwan Strait. The fourth part points out The inevitability of establishing the platform in Shaanxi Province.