Prefabricated　steel　structure　systems　have　become　new　trends　in　the　development　of　steel　structures.　Meanwhile,　earthquake-resilient　steel　structures　have　also　become　a　hot　issue　in　structural　seismic　performance　research.　Based　on　the　idea　of　damage　control,　this　study　proposes　a　new　type　of　earthquake-resilient　prefabricated　beam-column　steel　connection　(PBCSC),　which　is　formed　by　a　circular　tube　steel　column　with　a　cantilever　beam,　an　independent　beam　segment,　and　a　connection　component.　The　thickness　of　the　flange　cover　plates,　distance　between　bolts,　and　some　other　parameters　could　be　adjusted　suitably　to　obtain　a　proper　connection　stiffness　so　that　sliding　of　the　bolts　and　plastic　deformation　of　the　flange　cover　plates　could　dissipate　energy　and　prevent　the　beam　and　column　from　plastic　collapse.　Quasi-static　tests,　tests　of　repaired　connections,　and　fatigue　tests　were　performed　on　six　specimens.　The　influences　of　several　factors,　such　as　thickness　of　the　cantilever　beam　flange,　weakened　form　of　the　flange　cover　plate,　retrofit　by　adding　brass　friction　plates,　and　repair　after　earthquake,　were　investigated　to　assess　the　seismic　behaviour　of　the　connection.　The　experimental　results　showed　that　the　new　type　of　PBCSC　could　dissipate　energy　through　the　plastic　deformation　and　slip　friction　of　the　flange　cover　plate.　The　plastic　damage　of　the　PBCSC　was　mainly　concentrated　in　the　replaceable　plates,　which　was　beneficial　to　the　earthquake　resilience　of　the　connection.　The　bearing　capacity　and　the　energy　dissipation　capacity　of　the　connections　remained　stable　after　repair.　The　stable　performance　of　the　connection　under　low-cycle　fatigue　load　showed　that　it　could　be　used　as　a　displacement-control　damper.　(C)　2018　Elsevier　Ltd.　All　rights　reserved.