The contact stress of the eccentric roller bearing as well as static and dynamic deformation of the roller was studied, in order to obtain the relationship between the contact stress/deformation and structure/working condition factors. Based on the theories of Hertz elastic deformation and lubrication, the relationship model of the contacting stress and the static and dynamic contacting deformation of the roller was built. And then the finite element software Ansys was used for simulation and calculation. The relationship equation of the roller deformation under static and dynamic (lubrication and rotation speed) conditions was established, and the contact stress and deformation of the eccentric double-row cylindrical roller bearing of the printer as well as the relationship between them were analyzed. It was shown that the contact stress between the roller and the inner and outer rings increased along with the increase of radial load, and the contact stress between the inner ring and the roller was greater than that between the outer ring and the roller. The total contact deformation of the roller was in proportion to radial load, and the internal and external contact stress of the roller was in proportion to the total contact deformation of the roller. The stress concentration appeared at the edge of the roller, and it should be reduced by convexity design, in order to better improve the overall performance of the eccentric bearing. The relationship between the contact stress and the deformation provides theoretical basis for the design and optimization of eccentric bearing.