Introduction：The project is located in Muwen River and Dawenkou town on the North Bank of Dawen River, with a construction scale of 13000 Mu and a sewage treatment capacity of 60 × 10⁴㎡ d。 The construction of the project has significantly improved the water quality of Dawenkou section of the Dawen River, gradually restored the ecological environment of the damaged river, and greatly improved the living environment quality of local residents.