In view of the dynamic change of the oil film stiffness during the normal operation of rolling bearings is difficult to be accurately reflected by the traditional empirical formula,a rolling bearing oil film stiffness model based on multiparameter coupling was established, taking into account the nonNewton fluid elastohydrodynamic lubrication,rough surface morphology,thermal effect,timedependent effect and other factors. The changing rules of the oil film pressure,film thickness,temperature,and oil film stiffness in a complete cycle were obtained by numerical calculations.The results show that the oil film stiffness is nonlinear in a cycle,which increases with the increasing of load,viscosity,surface roughness,and decreases with the increasing of entrainment velocity.The oscillation frequency of oil film stiffness increases with the increasing of the wavelength of surface roughness,as well as the angle between the texture direction of rough surface and rolling direction of bearing.When the bearing running,the temperature rise of the oil film is the largest,the temperature rise of the inner ring is the second,and that of the rolling body is the minimum but should not be neglected.