Abstract: Artificial wetland was applied in combination with traditional wastewater treatment technology,and an intensified pre-treatment system was introduced to high-efficiency vertical flow constructed wetland so as to improve the wetland treatment.Through 9 months of running,it had been proved that the pretreatment setting declined the pollutant amount into the wetland,and increased the wastewater purification efficiency.The improved wetland system had the satisfactory purification effect on confluence sewage,and the cost was rather low.So the treat system is suitable to the areas which have relatively rich land but fewer funds.