Abstract: The authors have done research on Shiyan Constructed wetland of Shenzhen,including construction,composition,function,characteristic of technology,mechanisms of decontamination and process of synchronized nitrogen and phosphorus elimination.According to the operational aspect of Shiyan vertical constructed wetland,this paper analyzed the treatment effect,removal efficiency and economical efficiency of engineering,the main results show that wastewater treatment by using vertical-flow constructed wetland is effective and will be extensively used in the future.