Dadan River () is a right tributary of the Jinsha River in Yunnan, Southwestern China. It is 102.4 km long in total, with a watershed area of 1,888 square kilometers.
Dadan River rises in the western Binchuan County, the upper course is called Waxi River (, WÃÂxë hé) or Binju River (, Bënjà « hé). The middle course of it is called Sangyuan River (, SÃÂngyuán hé) or Naxi River (, Nàxë hé) and flows through the Binchuan County from south to north.
The lower course of it is located in southern Yongsheng County. The river has a length of 102.4 km and drains an area of 1,888 square km.
The River has also spots for fishing such as Yongsheng, Lijiang, Yunnan.