Huannan County, located in the eastern part of Heilongjiang Province, the foothills of Wanda, the afterpulse of Changbai Mountain, covers an area of 4417.9 square kilometers. Huannan County has jurisdiction over 6 towns, 4 townships and 192 administrative villages. According to the seventh census, the permanent population of Huannan County was 286,855 as of midnight on November 1, 2020.

Huanan County was founded in June 1946, because it is located in the south of Huachuan County named. Huanan County belongs to the cold temperate continental monsoon climate, spring, summer, autumn and winter four distinct seasons, winter is long and summer is short. Huannan County's main agricultural products are soybean, corn, rice, white melon, Perilla, flue-cured tobacco and so on. Stag-jia Railway and Heda, Yilao and other national trunk roads through the border.

On May 5, 2019, the Heilongjiang provincial government approved Huannan County to be removed from the poverty-stricken county list. In December 2019, it became a pilot unit for the construction of the country's rural governance system.
In 2020, the total production of Huannan County.