Longxian County, subordinate to Baoji City, Shanxi Province, is located in the west of Guanzhong Plain, northwest of Baoji City. It is adjacent to Qianyang County in the east, Chencang District in the south, and Qingshui County, Zhangjiachuan Hui Autonomous County, Tianshui City, Gansu Province in the northwest, Huating County, Chongxin County and Lingtai County in Pingliang City. Between east longitude 106°26 '32 "-- 107°8' 11", north latitude 34°35 '17 "-- 35°6' 45", north-south width 57.6 kilometers, east-west length 59.7 kilometers, a total area of 2277 square kilometers. It has jurisdiction over 10 towns.

Longxian County, known as Longzhou in ancient times, is the west gate of Shanxi Province. It got its name because it is located in the East ban of Longshan Mountain. It is the third-level city of Guanzhong Plain urban agglomeration and the sub-central city of Baoji. History is thick, the Duke Xiang of Qin established the capital here, open territory and soil; The First Emperor of Qin toured the west and regarded it as the west gate of Qin. Emperor Wudi of Han Dynasty ascended Longshou and set up the Big Zhen Pass here, which is known as "Han Pass, capital of Qin". Since Han and Tang Dynasties, Guanshan has become an important post on the Silk Road. Zhang Qian made a mission to the Western regions, and Tang Xuanzang made a pilgrimage to Zhu, which was the first great pass out of Chang 'an. Longxian County has a forest coverage rate of 60% and 49 rivers, which is known as the "faucet" of Guanzhong. It is an important ecological barrier in western Shanxi and the water conservation area of Baoji City. Guanshan grassland enjoys a good reputation throughout the country. The Taoist holy land Longmen Cave is honored as the "Ancestral Court of Longmen". Longzhou Shehuo and Longzhou Shadow puppetry are unique and have the reputation of "treasure house of folk art". It has won more than 20 honors, such as National Sanitary County, National Garden County, National Ecological Demonstration County, China Excellent Ecotourism County, the Hometown of Chinese Folk Culture and Art, and the Hometown of Chinese Walnut.

By the end of 2021, Longxian has 204,000 permanent residents. In 2021, the GDP of Longxian County reached 10.885 billion yuan, of which the primary industry was 2.342 billion yuan, the secondary industry was 4.461 billion yuan and the tertiary industry was 4.082 billion yuan. The tertiary industrial structure is 21.5:41.0:37.5. Based on the permanent population, the per capita GDP was 52,775 yuan.
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