A constructed wetland sewage treatment project in Linyi City has a treatment capacity of 300 tons/day, and the effluent meets the Class A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB 18918-2002). Through the construction of this project, the water quality and ecological environment of the river have been effectively ensured, which has promoted the harmonious development of urban and rural areas, economy and environment in the local area. At the same time, it has laid an important foundation for creating beautiful towns with national environment.