In order to improve the compressive and tensile properties and overall stability of the structure，the vertical pressure is applied to the reinforced soil structure in advance.In order to study the compressive，tensile and stability properties of the pre stressed reinforced soil under various working conditions，the finite element finite difference software ANSYS is used to establish the reinforced soil structure model.The objective of the model is to simulate the effect of preload on the structures under various operating conditions.The simulation results show that：1)in the traditional reinforced soil structure pre pressure exerted not only changed the soil stress distribution，enhance the effect of friction between soils；makes the soil more closely，thus limiting the lateral deformation of the soil，increase the soil strength.2)the tension member plays a role in transmitting tensile stress in the soil mass and making the upper and lower surface of the structure bear the pre pressure and confining pressure，thus greatly improving the stability of the soil mass.