The subject of interaction between foundation-subsoil and superstructure has become a new and hot application subject in recent years. In this paper

the foundation-subsoil and superstructure is studied based on the theory of the interaction between them. By choosing appropriate three-dimensional mechanical models

finite-element program "ANSYS" is used to calculate and analyze these models. In the method of simulation

material nonlinear and boundary nonlinear are considered. As for soft hard different foundation models

the result of calculation indicates that different hardness foundation will produce the stress distribution in upper structure and foundation again. At the same time

the diversification regularity of subsoil internal stresses is obtained. This result has its theoretical and applied values.