As an important part of urban development, the tunnel excavation is increasingly with the joint development of the surrounding lands. Therefore, the analysis on the impact of tunnel excavation on the adjacent foundation pits is increasingly important. Combined with Shenzhen Zhenhai Road Tunnel Excavation Foundation Pit Project, the finite element software PLAXIS is used to simulate the excavation of foundation pit and analyze its impact on the adjacent foundation pits. The relationship between the implementation distance of the adjacent foundation pit and the deformation of foundation pit is studied in regularity. The implementation impact of the foundation pit on the adjacent foundation pits is analyzed in the different intervals of foundation pit. The reasonable and safe design and construction suggestions are further proposed. The results have the certain reference significance for the construction and design of the similar projects.