Located in the northeast edge of Sichuan Province, with an area of 3,389 square kilometers, it governs 1 street, 29 towns and 2 townships. According to the data of the seventh census, as of 0: 00 on June 1 1 day in 2020, the resident population of Nanjiang County was 467,609. Nanjiang County has a long history of 1500 years. In the Southern Dynasties, Liang Wudi established Nanjiang County in six years (525), which was called "Difficult to wade the river". In the second year of the Western Wei Dynasty (555), he moved the capital to Pandao County.

There are three main rivers in Nanjiang County:

1, which runs through Nanjiang in the middle of the county, originates from Jiugen Tree in Yuquan Township, flows through Guanba, Shangliang, Tan, Qiao Ting, Nianpan, Nanjiang Town, Xiaohe, Shi Kuang, Shahe, Chixi, Xia Liang, Liangshui, Yuantan and other towns, and flows into Bahe River. The basin area in the county is 2347.4 square kilometers, the river length in the county is 1.2 1.7 kilometers, the average annual runoff of export is 1.700 million cubic meters, the natural drop is 1.346 meters, and the river slope is/.654.38+0.

2. Zheng Zhihe (Mumen River) is located in the west of the county seat, enters the county seat from Dong Fan, and flows into Bazhong Sanhui (Sanjiangkou) through Heping, Jiuding, Zheng Zhi and Fengyi. The basin area in the county is 4 16.8 square kilometers, and the length of the county inland river is 38.3 kilometers. The average annual runoff is 720 million cubic meters. The natural drop is 47.60 meters. The river slope is 1.2‰.

3. Jiaojiahe, located in the north of the county seat, originated from Daijiahe at the southern foot of Micang Mountain. From east to west, it flows through the dam and Taoyuan, leaving the county seat in Hu Aishu Township. The county's drainage area is 402.2 square kilometers, the river course is 53.2 kilometers long, the average annual runoff is 390 million cubic meters, the natural drop is 960 meters, and the river course gradient is 18. 1‰.