Lantian County, subordinate to Xi 'an of Shanxi Province, is located at the northern foot of the Qinling Mountains and the southeast of Guanzhong Plain. It is bounded by the Qinling Mountains in the southeast and is connected with Luonan County, Shangzhou District and Zhashui County of Shangluo City. In the west, Kuyu River is the boundary, adjacent to Chang 'an District and Baqiao District; The north is bounded by Mount Li, bordering Lintong District, Linwei District of Weinan City and Huazhou District, with a total area of 2006 square kilometers. About 19.9% of the total area of Xi 'an City, 22 kilometers away from Xi 'an city. . It has jurisdiction over 1 sub-district and 18 towns.

Lantian is the hometown of Hua Xu, the direct ancestor of Emperor Yan and Emperor Huang, the mother of Fuxi and Nwa. It is the origin of Lantian jade, one of the four famous jades, which is named for its abundant jade in the territory. It is known as "jade seed Lantian". Lantian is a famous historical and cultural city in Shanxi Province. Ancient ruins such as Shangchen Site and Lantian Man Site have been unearthed, and there are scenic spots such as Wuzhen Temple, Shuilu Nunnies, Wangshun Mountain and Tangyu Hot Spring, the ancestral court of Jingtu Buddhism.

By the end of 2021, Lantian has a permanent population of 495,400. In 2021, Lantian County achieved a gross regional product of 15.17 billion yuan, of which the added value of the primary industry was 3.309 billion yuan, the secondary industry 2.507 billion yuan, the tertiary industry 9.354 billion yuan, and the per capita gross regional product of 30727 yuan.