The lhm² integrated constructed wetland was built on the northern bank of Lake Fuxian, Yunnan Province, for reducing and controlling the development of its eutrophic state.Efficiencies of nitrogen removal of the wastewater from the Yaonigou river were investigated by using the integrated constructed wetland including the function parts of precipitation pond, oxidation ponds, constructed wetlands subsurface flow and surface flow.The results demonstrate that there was a very high capacity of nitrogen removal in the wetland.The average hydrologic budget was 437 mm/d.The average nitrogen loading was 3.315 g/(m²·d).The nitrogen retention was 1.91 g/(m²·d)·Nitrogen retention through plant uptake was 142 mg/(m²·d)·It was about 7.5% of total retention.The average removal rates of the constructed wetland for different species of nitrogen were 62.7% (NO_x^-), 53.8% (NH₄⁺), 62.4% (TON) and 57.5% (TN), respectively.The average removal rates of nitrogen were 39.4%, 18.5%, 10.6% and 3.6% in the surface flow constructed wetland, the oxidation ponds, the subsurface flow constructed wetland and the precipitation pond, respectively.