Abstract: Rolling force and rolling moment are the important parameters when cross rolling wedges mills forming automobile semi-axes was designed. The changes of rolling force and rolling moment are complicated in the rolling course due to the mutual restriction relation between main wedge and side wedge in the process of multi-wedge cross rolling wedges (MCRW) forming automobile semi-axes. The LS-DYNA finite element soft-ware was adopted to simulate the process of MCWR rolling automobile semi-axes by setting up a finite element model. The rule was obtained that the rolling force and rolling moment change with every factor in the rolling course.