A new design method of cam contour curve based on ADAMS was put forward to solve the difficult problem of designing cam contour curve for the complicated structure of packaging machine pusher mechanism. The virtual prototype of the pusher mechanism was built according to mechanism analysis of the pusher. The trajectory of the pusher plate was planned based on the virtual pusher mechanism model and the kinetic curves of two swing stems were obtained through the automatic dynamic and inverse dynamic solving of ADAMS. Then the cam contour curves can be obtained through the rollback method and the create trace spline function of ADAMS. The feasibility of this method was verified through consistence comparison between the planned trajectory and the forward dynamic simulation trajectory.