Qin'an County is under the jurisdiction of Tianshui City, Gansu Province, located in the southeast of Gansu Province, the north of Tianshui City, and the lower reaches of Hulu River, a branch of the Weihe River; The center is located at 34 ° 51 ′ N and 105 ° 40 ′ E; The total area is 1604 square kilometers. By 2015, Qin'an County had jurisdiction over 12 towns and 5 townships. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent population of Qin'an County was 416337.

Qin'an County has a temperate and semi-humid climate in the south of central Gansu, with an average annual temperature of 10.4 ℃ and an average annual precipitation of 507.3 mm in normal years. Qin'an County, one of the 18 arid counties in Gansu Province, is located in the western hilly and gully region of the Loess Plateau in the middle of Gansu Province.

As of 2015, 72 Neolithic cultural sites such as Yangshao, Majiayao and Qijia Culture have been found in Qin'an County, including 3 national key cultural relics protection units, namely Dadiwan, Xingguo Temple and Dacheng Hall of Confucian Temple, 4 provincial cultural relics protection units and 65 county-level cultural relics protection units. In February 2020, Qin'an County was approved to quit after being approved by the leading group of poverty alleviation in Gansu Province.

In 2020, Qin'an County will achieve a gross domestic product of 7.866 billion yuan, fiscal expenditure of 5.2 billion yuan, total retail sales of consumer goods of 3.937 billion yuan, and the balance of deposits and loans of financial institutions in the county will reach 17.468 billion yuan and 12.152 billion yuan respectively, ranking first among the five counties in the city; The investment in fixed assets reached 4.461 billion yuan, maintaining a double-digit growth rate for three consecutive years; The large-caliber fiscal revenue reached 1.194 billion yuan, 2.5 times that of 2015; The general public budget revenue was 276 million yuan, the added value of industries above designated size was 147 million yuan, and the per capita disposable income of urban and rural residents was 30772 yuan and 9332 yuan respectively.