The　bond　behavior　of　spiral　ribbed　ultra-high　strength　(SRUHS)　steel　rebar　embedded　in　plain　high　strength　concrete　(HSC)　and　steel　fiber　reinforced　high　strength　concrete　(SFRHSC)　is　experimentally　studied　using　pull-out　tests.　The　influencing　factors　of　concrete　type,　embedded　length,　cover　thickness　and　stirrup　ratio　are　considered　and　the　bond　failure　characteristics　as　well　as　the　whole　process　of　stress-slip　behavior　are　analyzed.　The　research　shows　good　anchorage　ductility　between　SRUHS　steel　rebar　and　HSC.　Since　SRUHS　steel　rebars　have　continuous　spiral　bite　teeth　with　concrete,　the　concrete　in　the　rib　dales　is　not　easily　sheared　off,　thereby　leading　to　a　reliable　bond　strength.　Compared　to　specimens　without　steel　fibers,　steel　fiber　reinforcement　can　increase　the　ultimate　bond　strength,　bond　stiffness　and　residual　strength.　Meanwhile,　it　will　also　reduce　the　influence　of　cover　thickness,　stirrup　ratio　on　the　specimens　with　steel　fibers.　Finally,　a　prediction　calculation　for　ultimate　bond　stress　and　an　analytical　model　for　bond　stress-slip　relation　are　proposed,　which　match　well　with　test　results.