In order to study the deformation characteristics of foundation pit zoned excavation in soft soil area, this paper takes Hangzhou New World Wangjiang New City No.4 deep foundation pit as the background, and analyzes the deformation monitoring data of soil body and ground connecting wall outside the pit in the process of zoned construction, and uses numerical simulation to carry out a comparative analysis. The results show that: the deformation of the ground-connected wall shows parabolic changes during the excavation of the foundation pit, and the ground-connected wall will be pushed back to displacement during the construction of the pit; the deformation of the deep soil outside the pit is similar to the deformation of the ground-connected wall, but the size of the deformation is smaller than the deformation of the ground-connected wall; the value of the ground surface settlement outside the pit increases with the excavation of the foundation pit, and it is affected by the environment; the top of the wall settles in the process of the excavation of the foundation pit and the construction of the main structure inside the pit, and it shows a “bulge first and then settle”. The settlement of the top of the wall presents a phenomenon of "uplift first and then settlement" during the excavation of the foundation pit and the construction of the main structure in the pit.