The　research　of　prefabricated　steel　structure　have　become　a　hot　topic　in　international　structural　engineering,　which　accelerates　its　promotion　and　application.　Based　on　the　idea　of　damage　control,　an　earthquake-resilient　prefabricated　beam-column　steel　joint　(PBCSJ)　has　been　proposed,　which　can　make　the　plastic　damage　occur　at　the　flange　cover　plate　(FCP)　by　reasonable　design　of　the　FCP　thickness,　middle　bolts　interval　and　other　parameters.　It　is　ensured　that　no　plastic　damage　occurs　at　the　main　components　such　as　beams　and　columns.　Thus,joint　can　be　repaired　by　replacing　the　connection　devices　to　restore　its　use　function.　In　this　article,　four　specimens　are　designed,　and　the　quasi-static　loading　tests　and　the　numerical　simulations　are　conducted　to　the　four　specimens　and　two　repaired　specimens.　The　impact　on　the　seismic　performance　caused　by　the　FCP　thickness,　FCP　connecting　bolts　number,　beam　gap　and　other　parameters,　as　well　as　the　post-earthquake　resilience　are　emphatically　investigated.　The　failure　mode,　hysteretic　curves,　skeleton　curves　and　other　main　performance　indexes　are　obtained.　The　study　shows　that:　PBCSJ　can　dissipate　energy　through　the　FPC　plastic　deformation;　the　thickness　of　FCP　has　a　relatively　big　influence　on　the　joint　bearing　capacity　and　energy　dissipating　performance;　the　decreasing　number　of　FCP　connecting　bolts　would　cause　the　FCP　sliding;　the　insufficient　gap　of　beams　would　cause　the　local　plastic　damage　due　to　the　extrusion　of　the　beams.　In　addition,　the　joint　before　and　after　the　repairing　would　have　excellent　bearing　capacity　and　energy　dissipating　performance.　The　results　of　the　refined　finite　element　(FE)　analysis　basically　match　the　test　results,　and　can　be　used　as　an　important　tool　for　the　performance　study　of　such　type　of　joints.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.