In consideration of the bearing radial load and rotational speed,the integrity finite element model for dynamic contact problem of deep-groove ball bearing was established through the application of ANSYS/LS-DYNA software.The rolling element was taken as linear elastic body while the inner-outer ring and cage were regarded as rigid body,and the three contact pairs of rolling element to inner ring,outer ring and the cage were also defined.Based on explicit dynamic finite element method,by using fully integrated element algorithm to control the hourglass and setting the mass scaling time step size to reduce the calculating time,a dynamic contact analysis of the deep-groove ball bearing with different radial load and rotational speed imposed on inner ring was made,the nodal displacement,velocity,acceleration of bearing and stress of rolling element were obtained.It can been seen through calculating that the maximum velocity is shown at the contact point between the rolling element and the inner ring,while the minimum velocity is shown at the contact point with outer ring,with the increasing of the speed the rolling bearing vibration increased significantly,and showing the strong nonlinear.The maximum equivalent stress and shearing stress of the beating is also occurred at the contact point of raceway,and the inner is bigger than the outer ring.The finite element based dynamie simulation of rolling bearing in operation,has an important guiding significance to research the dynamic load between the rolling bearing components and the dynamic characteristics of rolling bearing.