Abstract: To study the compression stiffness of rubber bearings with different sectional shapes under shear deformation, the compression stiffness ratio formulas of bearings with four sectional shapes (annular, round, square and rectangular) based on the two-spring model and effective area model are derived. Seven finite element models are established with ABAQUS. The validity of the models is verified by comparing existing compression tests and shear tests with finite element model results. On this basis, the compression performance of various rubbers are analyzed by combining with theoretical models. The results show that in compression and shear test, the error of stiffness between calculated and experimental values are within 5%. The compression stiffness ratio of bearing is only related to the ratio of the shear deformation to the inertia radius of section, and it has nothing to do with the shape and size of the section. The model and the fitting stiffness ratio formula in this paper can effectively simulate the compression stiffness of rubber bearings under different levels of shear deformation.