In　real　engineering,　the　surfaces　are　rough.　To　study　the　thermodynamics　during　sliding　wear,　based　on　G-W　(Greenwood-Williamson)　contact　model,　a　thermo-structure　coupling　model　for　the　rough　surface　sliding　friction　is　established.　In　this　model,　two　sliding　rough　surfaces　are　simplified　to　a　smooth　one　and　a　rough　one　which　has　regular　asperities.　And　the　boundary　condition　of　the　moving　source　is　considered.　The　model　integrates　the　heat　flux　coupling　between　the　sliding　surfaces　and　allows　the　analysis　of　the　effects　of　elastic　deformation.　From　the　numerical　analysis　the　transient　stress/temperature　fields　of　the　rough　surfaces　during　frictional　sliding　are　obtained.　This　gives　further　study　on　the　thermo-mechanical　failure　and　the　wear　mechanism　for　theoretical　basis.