Asphalt　binder　as　a　by-product　of　petroleum　is　a　finite　resource.　Hence,　finding　an　alternative　material　for　asphalt　binder　is　a　potential　topic　in　the　road　engineering.　Performance　of　compound-modified　asphalt　material　at　high　temperatures,　by　waste　cooking　oil　(WCO)　and　organic　montmorillonite　(OMMT)　was　investigated　in　this　study,　and　the　multi-scale　correlation　evaluation　was　conducted.　The　findings　revealed　that　the　bio-oil　significantly　reduces　the　barrier　to　rutting　of　asphalt　materials　within　multi-scales,　and　rutting　resistance　was　reduced　with　increased　content.　High-temperature　performance　can　be　regained　or　even　better　than　that　of　base　asphalt　materials　when　WCO　Bio-oil:　OMMT　is　1:1,　and　OMMT　can　compensate　for　the　loss　of　high-temperature　performance.　Besides,　the　multi-scale　correlation　analysis　shows　that　the　Jnr3.2　index　of　OMMT　composite　modified　bio-asphalt　mastic,　asphalt　mixtures＇　resistance　to　rutting　at　high　temperatures　can　be　predicted　using　their　short-term　aging　condition.　©　2023　Elsevier　Ltd