In　order　to　study　the　effect　of　different　rock　asphalt　contents　on　the　physical　and　mechanical　properties　of　an　asphalt　binder　and　asphalt　mixture,　the　physical　and　mechanical　tests　and　analysis　were　conducted.　An　on-site　case　was　investigated　to　verify　the　effectiveness　of　rock　asphalt-modified　pavement.　The　results　show　that　the　activation　treatment　can　effectively　enhance　the　molecular　polarity　of　Buton　rock　asphalt.　The　＂wet　process＂　was　used　to　prepare　the　Buton　rock　asphalt-modified　asphalt　binder,　and　the　high-temperature　performance　and　aging　resistance　were　significantly　improved.　The　modified　asphalt　prepared　by　mixing　30%　rock　asphalt　shows　the　optimum　balance　between　service　performance　and　segregation.　The　on-site　full-scale　application　of　the　Buton　rock　asphalt-modified　asphalt　pavement　showed　the　good　workability　and　service　performance.　This　research　demonstrated　the　ability　of　rock　asphalt　improving　asphalt　pavement　on　multiscales.　It　is　helpful　for　the　broader　application　of　rock　asphalt　in　asphalt　pavement.