1, flood control: Danjiangkou Reservoir is the core of the flood control engineering system in the middle and lower reaches of the Han River, which has sufficient flood control benefits for the middle and lower reaches of the Han River.

2. Water supply: Danjiangkou Reservoir, as the water source of the Middle Route of South-to-North Water Transfer Project, can provide stable and reliable water resources for the northern region.

3. Power generation: Danjiangkou Reservoir, as one of the largest hydropower stations in China, can provide a lot of clean energy and reduce environmental pollution.