Abstract: According to a comparison based on measured foundation pit data at Haiyan North Road Station on Ningbo rail transit, the supporting effects of hydraulic servo steel support and ordinary steel support are studied. Then, Plaxis 3D software is used to conduct a numerical simulation of foundation pit excavation design scheme, which is to replace the fifth concrete support with hydraulic servo steel support. The monitoring data analysis shows that compared with the ordinary steel support section, the deformation displacement of the adjacent hydraulic servo steel support section is about 22% smaller than that of ordinary steel support, the effect of the hydraulic servo steel support is obviously better than ordinary steel support. By taking the advantages of the servo system low compensation, when the fifth concrete support of servo supporting section is replaced with hydraulic servo steel support under the condition of 3 000 kN or 4 000 kN axial force, both solutions can meet the deformation requirements allowed by the specification. Therefore, it has certain feasibility if the servo steel support is used to replace the fifth concrete support.