Abstract: In recent years, constructive destruction of water ecological landscape has emerged in succession. How to coordinate water conservancy safety, ecological safety and landscape demands to co-exist in a complex water ecological landscape system has aroused widespread thinking in the industry. Starting with the characteristics of water environment and its evaluation factors, this paper proposes a water ecological landscape planning and design method based on the numerical simulation technology. This method can achieve multi-scheme comparison and selection, improve the scientific nature and rationality of water ecological landscape planning and design, and further promote the multi-objective integration through establishing the dynamic relationship between the water landscape physical form and its intrinsic ecological characteristics with the computer simulation technology, and through the design-analysis-evaluation-re-design cycle design path. With the two practical cases, this paper explains the principle, process and tools of water ecological landscape planning and design that is based on the numerical simulation technology, providing a new idea for water ecological landscape palnning and design.