validated finite element analysis was used to study the seismic response of the Mechanically Stabilized Earth (MSE). A series of parametric studies were conducted to investigate the behavior of MSE walls under seismic conditions using finite element analysis. From the numerical analysis, it can be concluded that during the earthquake, in the static case, the axial force in reinforcement decreases as the relative density of the foundation soil increases. Also, in the case of the earthquake, the axial force in reinforcement increases as the relative density of foundation soil increases. Furthermore, in the case of medium and loose sand, the soil acts as a damper to the earthquake motion. Also, the horizontal displacement increases as the relative density of foundation soil increases. Finally, during the earthquake, the horizontal displacement of the MSE wall increases as the groundwater level decreases. Furthermore, the maximum axial force in reinforcement occurred at dry soil conditions. Therefore, the worst case during the earthquake occurred when the groundwater level dropped.