Taking a deep foundation pit in Shenzhen as a case study, the variation laws of settlement, horizontal displacement, anchor cable axial tension and groundwater level around the foundation pit in different construction stages were analyzed based on the monitoring data of the whole construction process. The monitoring data show that the ground settlement around the foundation pit, the erect column settlement, the horizontal deformation of the supporting pile and the ground deformation around the foundation pit are within the alarm value range, indicating that the foundation pit-supporting scheme is reasonable. In addition, the excavation and unloading in the pit will lead to rebound deformation at the bottom of the pit and slight uplift deformation of the erect column. The settlement and horizontal deformation of the nearby metro wind pavilion structure are the most obvious. Moreover, for some monitoring points, the decline of accumulated groundwater level exceeds the alarm and control value, so it needs to take appropriate measures (such as recharge) to control the additional settlement of foundation pit caused by the sharp decline of groundwater level.