Abstract: The dewatering design of deep excavation with suspended impervious curtain for A station was analyzed by using three-dimensional finite element model and based on the data of geotechnical investigation and pumping test of Metro Green Line Project in Tel Aviv, Israel. According to the simulation results, the original dewatering design could not meet the requirements of water level for construction in the middle of the foundation pit, because the spatial uneven distribution of impervious layer was not fully considered. After further analyzing the influence of several factors on dewatering effect such as discharge of single well, distribution of dewatering wells and depth range of screen, the suggestions for improvement were given, which increase the dewatering effect and reduce the head difference between both ends and the middle of the foundation pit. And it is also conducive to excavation and cost saving. This work can be used as a reference for people related to design and construction in similar projects.