中文摘要：

丝绸路上著名关隘玉门关，伴随着中原王朝西方战略的发展及中西交通路线的变化，关址有过几次改徙。该文披检有关史料，并经反复实地考察，考得西汉最早设置的玉门关位于今甘肃省嘉峪关市石关峡，置关时间约在武帝元鼎六年（公元前111年）或稍后；约在太初三、四年（公元前102—公元前101年）李广利第二次伐大宛之际，玉门关遂西迁至敦煌西北一带；约在东汉永平十七年（公元74年）随着瓜州径通伊州（哈密）伊吾路的开通，玉门关又东迁至今瓜州县双塔堡附近；迨及五代宋初，作为瓜沙归义军政权与甘州回鹘政权的天然分疆之地，玉门关又重新设在石关峡。玉门关前后延续约1140余年。

英文摘要：

The Yumen Pass, a famous pass on the ancient Silk Road, witnessed several changes along with western strategic requirement of Central Plains imperial court and development of traffic between China and West.On the basis of the studies of predecessors, having looked over the relevant historical materials and made repeatedlly on-the-spot investigations, this paper proves that the earliest Yumenguan Pass was set up in 111 B.C. or a bit later in the Han Dynasty and located in the Shiguanxia Gorge in the City of Jiayugun, Gansu Province. In about 102-101 B.C., the Yumenguan Pass was moved to the northwest of Dunhuang. Along with the opening of the Yiwu Road from Guazhou to Yizhou, the Yumen Pass was then removed to Shuangtabu in County of Guazhou. Till the Five Dynasties and early Song Dynasty, the Yumenguan Pass, regarded as a natural military demarcation line of Guiyijun regime and Ganzhou Huihu regime, was relocated back to the Shiguanxia Gorge in the City of Jiayugun.