Xiaojin County is under the jurisdiction of Aba Tibetan and Qiang Autonomous Prefecture in Sichuan Province. Zanla, the Tibetan name, means evil. It is named after the small Jinchuan in the territory. Xiaojin County is located at the eastern edge of the Qinghai-Tibet Plateau, in the northwest of Sichuan Province, and in the south of Aba Tibetan and Qiang Autonomous Prefecture. It is adjacent to Wenchuan County in the east, Danba County in Ganzi Prefecture in the west, Baoxing County in Ya'an City in the south and Malkang City in the north. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent population of Xiaojin County was 64813.

In 2017, Xiaojin County achieved a GDP of 1.5457 billion yuan, an increase of 4.6%. Among them, the added value of the primary industry is 310.9 million yuan, the added value of the secondary industry is 6474.2 million yuan, the added value of the tertiary industry is 587.38 million yuan, and the tertiary industrial structure is 20.1:41.9:38.

Xiaojin County's famous and high-quality specialties mainly include Xiaojin Tricholoma, Xiaojin Fritillaria, Tibetan pork products, etc; The scenic spots mainly include Lianghe Scenic Spot, Jiajin Mountain National Forest Park, Siguniang Mountain Scenic Spot, etc.

On April 28, 2019, the People's Government of Sichuan Province decided to withdraw Xiaojin County from the poverty line.