In　order　to　transform　constant　rotation　motion　into　variable　oscillation　traverse　output　motion,　a　theoretical　tooth　profile,　which　could　realize　to　output　oscillation　traverse　motion　in　continuous　or　batch　process,　was　designed,　and　then　the　working　profile　equations　were　derived　for　enclosed　slot　of　actuating　plate　and　the　swing　plate.　On　this　basis,　contact　force　models　and　algorithms　of　meshing　pair　were　established　in　the　light　of　force/torque　balance　equation　and　theory　of　Hertz,　and　taking　the　same　load　and　equal　swing　angle　as　the　example,　the　characteristics　of　meshing　force　of　cam　mechanism　with　movable　teeth　in　the　condition　of　different　steel　ball　numbers　and　various　motion　laws　were　analyzed.　The　acquired　result　of　meshing　force　analysis　can　be　adopted　as　the　theoretical　basis　for　bearing　capacity　analysis,　stiffness　estimation,　as　well　as　structure　design　of　the　swing　output　cam　mechanism　with　movable　teeth.　©　2018,　Editorial　Department　of　Transaction　of　Beijing　Institute　of　Technology.　All　right　reserved.