Abstract: Objective: To verify the safety, stability, and advantages of precast concrete support, it is necessary to analyze its impact on shaft construction stability in metro project. Method: Compared with castinplace support mode, the metro shaft adopting precast concrete support is targeted for analysis. The construction process is analyzed in 2D and is numerical simulated in 3D. By analyzing the support axial forces and calculating the retaining pile settlement and horizontal displacement, the impact of precast concrete support on metro shaft construction stability is analyzed and verified through field measured data. Result & Conclusion: The spatial effect of the shaft is evident, and the 3D simulation results are more consistent with fieldmeasured ones. Compared to castinplace support, the precast concrete support exhibits smaller axial forces and less horizontal displacement of the retaining piles, indicating that precast concrete support can provide better stability during shaft construction. The settlement of the retaining piles is consistent for both support modes, showing a ′steplike′ decrease in cumulative settlement at pile top after excavation, with accelerated descent of the 2D simulation results in later stages. The castinplace support experiences pressure from the initial stage, while the precast concrete support is subjected to tension due to the counterprestressing action during the early stages of construction. Throughout the construction process, the axial forces in the castinplace support are greater than those in the precast concrete support. According to the 2D model simulation results, the horizontal displacement at the upper and lower ends of the retaining piles is relatively large. The 3D simulation results show that shaft walls on both sides can restrain the soil pressure and horizontal displacement on the north side piles, and the constraint action of supports 1 to 7 reduces pile deformation at different elevations.