This　study　investigates　the　bond–slip　behavior　between　high-strength　recycled　coarse　aggregate　concrete　(RAC)　and　ultra-high-strength　steel　bar　with　spiral　groove　(UHSSB).　Twenty-four　beam　tests　were　carried　out　to　consider　the　effects　of　recycled　coarse　aggregate　(RCA)　replacement　ratio,　concrete　cover　thickness,　stirrup　ratio,　concrete　strength,　addition　of　steel　fiber　and　presence　of　anti-corrosion　coating.　The　influences　of　different　parameters　on　failure　mode,　bond–slip　curve　and　bond　strength　are　discussed.　The　reinforcement　is　pulled　out　in　all　specimens　before　it　yields.　The　reduction　of　the　RCA　replacement　ratio,　the　increase　of　the　concrete　cover　thickness　or　stirrup　ratio,　and　the　addition　of　steel　fiber　are　capable　of　preventing　the　concrete　from　splitting　and　reducing　the　crack　width.　The　RCA　replacement　ratio　has　little　effect　on　bond　strength　which　decreases　by　no　more　than　13%.　Increasing　the　concrete　cover　thickness　and　increasing　the　stirrup　ratio　in　a　certain　range　can　significantly　increase　the　bond　strength.　However,　mixing　steel　fiber　has　little　effect　on　the　bond　strength.　Furthermore,　the　bond　strength　of　RAC　is　positively　correlated　with　f’c1/2,　which　is　similar　to　that　of　NAC.　The　anti-corrosion　coating　significantly　reduces　the　bond　strength.　The　bond–slip　model　is　proposed　based　on　the　fitting　of　test　results.　The　results　of　this　research　can　provide　a　reference　for　the　engineering　application　of　high-strength　RAC　and　UHSSB.　©　2022,　Iran　University　of　Science　and　Technology.