To　study　the　effect　of　solid　body　contact　deformation　on　the　real　contact　area,　various　models　are　established.　These　contact　models　include　a　contact　model　between　an　elastic　rough　solid　and　a　rigid　flat　one　(E-R　model),　an　elasto-plastic　rough　solid　and　a　rigid　flat　one　(P-R　model),　an　elasto-plastic　rough　solid　and　an　elastic　flat　one　(P-E　model),　an　elasto-plastic　rough　solid　and　an　elasto-plastic　flat　one　(P-P　model).　The　effects　of　thermo-mechanical　coupling　and　the　heat　flux　coupling　are　considered　in　the　model　which　is　solved　by　ABAQUS　software.　The　results　show　that　the　real　contact　area　is　not　only　determined　by　the　normal　load,　but　also　affected　by　the　contact　deformation　mode　of　solid　body.　The　real　contact　area　from　the　purely　elastic　model　(E-R　model)　is　much　smaller　than　that　from　the　other　elasto-plastic　model.　But　the　real　contact　area　obtained　from　the　P-R　model　is　the　largest.　No　matter　what　kind　of　the　solid　body　contact　deformation　is,　at　the　moment　of　the　abrupt　change　of　sliding　speed　and　of　the　hot　spotting　coming　into　being,　the　real　contact　area　increases　noticeably,　and　then　varies　in　a　small　range　during　the　constant　frictional　sliding　process.　©　2015　Engineers　Australia.