In　the　process　of　using　Buton　rock　asphalt-　(BRA-)　modified　asphalt,　in　order　to　improve　the　utilization　rate　of　Buton　rock　asphalt　and　the　performance　of　the　modified　asphalt,　this　paper　puts　forward　the　process　of　＂activation＂　treatment　of　Buton　rock　asphalt,　that　is,　grinding　and　heating　of　BRA　to　make　natural　asphalt　precipitate.　Laboratory　tests　show　that　compared　with　modified　asphalt　without　activation　process,　the　penetration　of　the　modified　asphalt　decreases,　the　softening　point　rises,　the　ductility　at　5　degrees　C　and　the　kinematic　viscosity　at　135　degrees　C　all　have　been　increased,　and　the　performance　of　the　modified　asphalt　increases　with　the　increase　of　the　content　of　activated　BRA.　In　order　to　further　clarify　the　effect　of　＂activation＂　process　on　the　properties　of　BRA-modified　asphalt　from　microlevel,　atomic　force　microscopy　(AFM)　was　used　to　test　the　microproperties　of　Buton　rock　asphalt　before　and　after　activation.　It　is　found　that　the　Derjaguin-Muller-Toporov　(DMT)　modulus　of　the　modified　asphalt　is　about　2.5　times　that　of　base　asphalt,　which　indicates　that　the　viscous　degree　of　modified　asphalt　with　activated　BRA　has　been　greatly　increased　and　the　modification　effect　is　remarkable.