The Kaidu River (; ; ), also known under its ancient name Chaidu-gol, is a river in the Xinjiang Uyghur Autonomous Region of China and an important source of water for the region. The Kaidu River is responsible for many substantial effects on the environment. Affecting the land and its people in many different ways.

The sources of the Kaidu River are located on the central southern slopes of the Tian Shan from