左宗棠是晚清赫赫有名的疆吏。１８６７年他挥师进陕，随后又平定陕甘回民之乱，收复新疆。左宗棠西征无疑是有功的，不仅有效的捍卫了国家主权与领土完整，而且客观上对西北进行了初步开发，一定程度上促进了西北的近代化进程。一、巩固国防受嘉道年间研究西北史地风气的影响 Zuo Zongtang was a famous leader of the late Qing Dynasty. He marched into Shaanxi in 1867, and subsequently settled the disturbances of the Muslims and Muslims in Shaanxi and Gansu and recovered Xinjiang. Zuo Zongtang’s expedition is undoubtedly a merit. Not only has it effectively defended the country’s sovereignty and territorial integrity, but also has carried out the preliminary development of the northwest objectively, which has promoted the modernization of northwestern China to some extent. First, to consolidate national defense by Kadao years study of the impact of Northwestern historical geography