Two　rollers　contact　each　other　under　the　normal　load,　and　when　the　driving　roller　rotates,　it　drives　the　driven　roller　rotate　by　the　tangential　force　on　contact　area.　Finite　Element　Method　analysis　and　experimental　analysis　are　adopted　to　research　the　motion　mechanism　of　two　rollers　which　elasticity　has　big　difference　both　on　the　condition　of　direct　contact　and　indirect　contact.　From　the　analysis　it　is　achieved　that　the　relative　sliding　between　the　two　rollers　is　due　to　the　tangential　force　on　the　contact　area　and　the　radial　compression　deformation　of　the　soft　roller　which　has　greater　elasticity.　For　the　condition　of　indirect　contact　in　which　a　layer　of　inter-medium　exists　between　the　two　rollers,　the　relative　sliding　is　greater　than　that　on　the　condition　of　direct　contact,　and　the　hardness　of　the　inter-medium　layer　affects　the　relative　sliding　between　the　two　rollers.　And　for　the　condition　of　multiple　rollers　in　the　state　of　pressing　contact,　the　number　of　contact　areas　on　the　soft　roller　also　affects　its　motion　characteristics.　Copyright　©　by　HIGH　TECHNOLOGY　LETTERS　PRESS.