Damping　is　essential　to　bearing　dynamic　loads　of　construction　structures,　such　as　bridges,　pavements,　and　high-speed　rails.　This　paper　presents　a　novel　and　preliminary　understanding　of　the　damping　property　and　mechanism　of　styrene-butadienestyrene　modified　(SBS-modified)　bitumens.　The　damping　property　was　evaluated　based　on　the　temperature　spectra　of　the　loss　factor　(LF)　by　a　dynamic　shear　rheometer　and　the　damping　mechanism　was　interpreted　from　molecular　structure,　morphology,　and　thermal　analysis,　respectively.　The　results　first　demonstrated　that　the　SBS-modified　bitumens　appeared　to　maintain　good　damping　property　with　a　wide　effective　damping　temperature　range,　low　damping　temperature　susceptibility,　and　relatively　high　LF　in　normal　working　temperature　range　of　pavement.　In　addition,　the　damping　property　seemed　to　be　further　improved　separately　by　the　crosslinker　and　plasticizer　and　the　synthetic　role　on　improving　damping　capacity　was　also　observed　by　the　combination　of　these　two　additives.　Furthermore,　the　damping　property　of　the　SBS-modified　bitumens　appeared　to　be　considerably　influenced　by　temperature　and　the　integrity　of　the　hybrid　via　polymers　blending　and　the　use　of　additives.　It　was　noted　that　the　plasticizer　promoted　the　swelling　process　of　SBS　polymers,　by　which　improved　the　dispersion　and　chain　movement　ability.　Moreover,　the　crosslinker　increased　the　internal　friction　by　forming　denser　polymer　network.　The　findings　in　this　paper　will　facilitate　the　development　and　application　of　the　SBS-modified　bitumen　based　damping　materials　in　noise　and　vibration　reducing　and　controlling　to　some　extent.　©　2020