This paper relies on the foundation pit of the project of public green space and underground space in the bund in Shanghai, and uses Plaxis analytical system of finite fractile with Hardening soil small－strain model, and builts adjacent foundation pit model. The horizontal deformation of the foundation pit caused by the different construction sequence was studied. And the results showed that the effect of maximum horizontal displacement of foundation caused by the construction sequence is small. The effect caused by the first construction of foundation while excavation is shallow is bigger.