Abstract: The Winkler elastic foundation model is used to analyze the effect of deformation on the elasto-hydrodynamic of the finite length journal bearing. The dual iteration method of pressure and film thickness is used in the numerical simulation. The results indicate that the differences of oil film pressure and thickness between rigid and flexible bearing increase with the increasing load. Further studies were carried out for bearing surface deformation. The results show that with the increase of the load, the decreasing range of the eccentricity ratio reduces along with the increasing of the rotation speed, and the increasing range of the attitude angle also decreases along with the increase of the rotation speed. However, with the increase of the rotation speed, the increasing range of the eccentricity ratio increases along with the increase of the load, and the decreasing range of the attitude angle also increases along with the increase of the load. Besides that, the effect of the bearing width, bearing thickness, lubricant oil viscosity and clearance on the oil film pressure, thickness and fracture position were investigated under constant load. The findings of this study can provide corresponding theoretical instructions for the design and the performance computation of journal bearing.