Acrylonitrile-butadiene-styrene　(ABS)/ethylene-propylene-diene　monomer　(EPDM)　composites　reinforced　with　graphene　nanoplatelets　(GN)　were　fabricated　by　the　direct　melt　blending,　dried　premixing　and　wet　premixing　process,　respectively.　The　electrical　resistivity,　tensile　strength,　impact　strength,　microstructure,　thermal　stability,　glass　transition　temperature　and　morphology　of　fracture　surface　of　composites　were　investigated.　In　case　of　direct　melt　blending　process,　the　maximum　tensile　strength　with　minimum　impact　strength　is　obtained.　But　this　result　is　reversed　while　the　fabrication　of　composites　by　wet　premixing　process.　SEM　results　show　that　GN　is　prior　to　distributing　in　the　continuous　ABS　phase.　The　percolation　threshold　could　be　significantly　decreased　from　11.8　wt%　to　6.6　wt%　when　prepare　composites　by　wet/dried　premixing　process　instead　of　melt　blending.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.