Sunit Left Banner, under the Xilin Gol League, Inner Mongolia Autonomous Region. Located in the northwest of Xilin Gol League. It borders Mongolia in the north, 316 kilometers long. It borders Zhengxiangbai Banner and Zhenglan Banner in the south, Sunit Right Banner and Erenhot City in the west, and Abaga Banner in the east. Mongolian as the main body of the pure animal husbandry border flag. Banner people's government in Mandu Latu town. It covers an area of more than 34,000 square kilometers.

On July 27, 2018, the Inner Mongolia Autonomous Region people's Government approved the withdrawal of the poverty flag. The quality of farmers' cooperatives in the whole county to promote pilot units. According to the 7th Census data, as of 0:00 on November 1, 2020, Sunit Left Banner had a permanent population of 33,643.

In 2019, the annual GDP of Sunit Left Banner reached 2.623 billion yuan, with a year-on-year growth of 5.3%.