About 80 percents of pollution of Lake Xingyun come from non-point sources, and rivers account primarily for transporting pollutants into Lake Xingyun.To reduce the pollutants, wetlands with an area of 4.5 ha was restored in estuarine areas of Dajie River.The total amount of purified river water was 317.8×10⁴m³/a.It was showed that the purification efficiency was significant via the combined mechanism of absorption, decomposition and assimilation of aquatic plants.The removal rates of SS, B0D5, C0DMn, TN and TP were 82.8%, 60.1%, 52.8%, 49.2%, and 40.1%, respectively.