Based on the problems of insufficient hydrodynamic power, shortage of water resources, and serious water pollution in the water system/wetland in the lower reaches of the North Canal, combined with the characteristics of regional topography, the semi-natural wetland structure and function optimization technology has been integrated, including 5 key technologies, which can be comprehensively arranged inside the wetland. Organic combination, each plays its own role in purifying the water quality, while improving regional hydrological regulation and storage capacity and biodiversity level, and improving the wetland environmental landscape effect. Among the five technologies, the use of wind energy to improve water environment quality and hydrodynamic conditions and the coupling technology of wetland hydrological regulation and root pore filtration are used to solve the problem of hydrodynamic shortage, the undercurrent wetland water treatment technology and the coupled purification technology of wetland trench-stabilizing ponds are used to solve the problem of insufficient self-purification capacity of rivers/wetlands, and the efficient microbial degradation and plant restoration technology of wetland water bodies are used to solve the problem of restoration of wetland degradation. The technology is a technology integration based on sub-item technology research and development and improvement. It mainly focuses on the integrated application of special technologies proposed for various problems in the water area. It has been tested and verified on the water bodies of the Qilihai Wetland Area. It has a certain degree of maturity and can be carried out. Promote application. The technology is planned to be promoted in wetland and river management in Tianjin City by early intervention in the relevant planning and design stages of Tianjin City. It is expected that after application, it will significantly improve the wetland environment and river water quality in Tianjin City, and promote the harmonious development of regional economy, society and ecology.