Abstract: The rolling forming process is a feasible way to form high-performance complex profiles with energy saving, especially for the inner tooth forming. However, the limited space of the inner diameter poses a significant challenge to the arrangement and movement of the rolling die for the inner tooth rolling of splined hub. Thus, the radial-feed rolling process for the inner tooth of splined hub of a heavy-duty truck was studied by numerical methods. The single rolling die was adopted for the radial-feed rolling process due to the constraints of the inner space. The radial feed can be carried out by the rolling die or the workpiece when a single rolling die is adopted. During the rolling process of splined hub, the axial tooth profile is formed at the same time, and the plastic deformation zone and the high strain zone are concentrated in the inner surface. The main metal flows are the radial metal flow near the tooth root of splined hub and the metal flow along the tooth flank, and the axial metal flow is minimal. Compared with the through-feed rolling process, the shape of the splined hub rolled by radial-feed rolling process shows almost no difference in the middle zone but presents more difference at both ends.