Abstract: Under the joint force of pre-tightening force, axial and radial force, the geometric parameters of the contact area as well as the contact load of both inner and outer ring raceway contact interface were analyzed. By considering the macroscopic geometry of the contact area, the contact load, the real tooth surface roughness and transient effect of the angular contact ball bearing, a mixed lubrication model was established. The lubrication condition and subsurface von Mises stress of the bearing were calculated at different working condition. The results show that average film thickness between the ball and inner ring raceway decreased quickly, the dry contact area and subsurface von Mises stress increased significantly with the increasement of normal load. The increase in speed reduced dry contact area and subsurface von Mises stress but increased average film thickness. The results are of great significance to the engineering application of the angular contact ball bearing.