The　thermal-oxidative　aging　of　bitumen　is　extensively　studied　under　the　guidance　of　current　norms　in　laboratory　investigations,　while　the　photo-oxidative　aging　is　not　standardized　and　the　moisture　is　seldom　considered.　To　evaluate　the　aging　behaviors　of　bitumen　under　the　coupling　effect　of　multiple　aging　factors,　two　binders,　a　base　bitumen　and　an　SBS　modified　bitumen　(SBSMB),　were　treated　by　different　aging　inducements,　such　as　heat,　oxygen,　ultraviolet　(UV)　radiation　and　moisture,　then　their　physical　and　rheological　properties,　morphology　and　chemical　structures　were　investigated.　Results　indicate　that　two　binders　exhibit　similar　aging　behaviors,　the　elevated　aging　temperature,　prolonged　aging　time　and　coupled　aging　inducements　will　accelerate　the　aging　process,　and　the　aging　susceptibility　of　two　binders　is　higher　at　temperature　above　65　?　or　aging　time　within　10　days.　The　more　aging　inducements　would　cause　more　serious　aging,　the　heat-oxygen-UV-moisture　coupling　aging　causes　the　highest　aging　degree,　indicating　an　obvious　coupling　effect　in　aggravating　the　deterioration　of　binders.　Compared　with　thermal-oxidative　aging,　the　UV　or　UV-moisture　results　in　an　entirely　different　surface　morphology　of　bitumen,　leaving　a　very　rough,　dry　and　pale　surface.　The　transformations　of　chemical　structures　for　two　binders　caused　by　various　aging　show　a　similar　trend,　but　the　variation　extents　of　evaluated　parameters　of　SBSMB　is　less　than　that　of　base　bitumen　under　the　same　aging　condition,　indicating　the　modification　of　SBS　could　inhibit　the　aging　of　bitumen　to　some　extent.　Therefore,　UV　radiation　and　moisture　should　not　be　neglected　in　laboratory　aging　simulations.