Today, excavation is considered one of the most sensitive and important stages in urban construction, which engineers always try to analyze, design, and implement by choosing different methods. The importance of this issue becomes clear when, in urban environments, the analysis of displacement and deformation around the pit is mandatory based on national building codes and regulations, because the buildings and structures around the excavation site are very sensitive to asymmetric settlement. Therefore, in addition to analyzing the stability of the pit, engineers evaluate and predict deformations and displacements around the pit using geotechnical information of the construction site, pit geometry, overheads around the pit, and simulation of excavation stages. The analysis of displacement and deformation is highly dependent on the behavioral model of the construction site (soil and rock), and for simulating soil behavior in numerical software, the use of an appropriate behavioral model is of great importance. In this research, a case study of a 16.5-meter deep excavation in Tehran is conducted using a numerical method with finite element analysis to compare the results of the hardening behavior model and the Mohr-Coulomb behavior model and to compare them with the results of monitoring and instrumentation in the excavation. The results of this research show that the behavior of the excavation and deformations affected by excavation and excavation operations, by choosing the hardening behavior model compared to the Mohr-Coulomb behavior model, are more similar to reality and the results of excavation monitoring.