Abstract: In this article, through field sampling of a practical project in Beijing, determine the regional soil hardening model parameters through indoor triaxial test and consolidation test. Such as the strength parameters and stiffness parameters are greater than survey report provides. The finite element analysis software Midas GTS was used to simulate the excavation process of the foundation pit in modified Mohr Coulomb model, and compared with the measured data to verify the applicability of the model parameters. The strength parameters and the stiffness parameters of the soil determined by indoor triaxial test and consolidation test are more consistent with the mechanical properties of the undisturbed soil. These parameters can be used to predict the deformation of foundation pit and the force of supporting structure more reasonably. It provides a new reference for optimization of geotechnical engineering design.