The　damage　control　and　post-earthquake　repair　of　beam-column　joints　is　a　hot　research　topic　in　the　seismic　field.　Therefore,　a　new　type　of　earthquake-resilient　prefabricated　steel　beam-column　joint　with　replaceable　double　flange　cover　plates　(RFCP-ERPSJ)　was　proposed.　The　yield　load　of　this　joint　can　be　controlled　by　the　buckling　or　slip　of　plates,　so　it　can　be　divided　into　plate-slipping　type　and　the　plate-buckling　type.　Considering　that　the　yield　load　of　the　plate-buckling　type　RFCP-ERPSJ　is　stable,　firstly,　a　practical　design　procedure　and　design　theory　of　the　newly　plate-buckling　type　joint　is　proposed　in　this　paper.　Then,　to　study　the　seismic　performance　and　post　-earthquake　repairability　of　this　RFCP-ERPSJ,　a　total　of　6　full-size　specimens　are　designed　and　subjected　to　a　low　-cycle　reciprocating　loading　test　and　constant-amplitude　low-cycle　fatigue　test.　The　effects　of　the　thickness　of　FCPs,　the　material　strength　of　FCPs,　dog-bone　width,　amount　of　FCPs　connecting　bolts,　and　bolt　spacing　at　the　middle　row　on　the　seismic　performance　and　energy　dissipation　performance　of　the　joint　are　studied.　The　experimental　results　are　also　compared　with　the　theoretical　results.　The　research　showed　that　the　plastic　hinge　of　the　joint　could　be　concentrated　on　the　replaceable　FCPs,　so　as　to　protect　the　beams　and　columns.　By　replacing　damaged　FCPs　and　bolts,　the　repaired　joint　had　the　same　performance　as　the　original　joint.　After　comparison,　the　theoretical　yield　load　is　in　good　agreement　with　the　experimental　yield　load.　Besides,　the　small　thickness　and　dog-bone　width　of　FCPs　can　reduce　the　load　carrying　capacity　and　energy　dissipation　capacity　of　joints,　and　improving　the　material　strength　of　FCPs　will　reduce　the　ductility　of　joints　and　increase　the　risk　of　plastic　damage　to　the　beams　and　columns.　If　the　amount　of　FCPs　connecting　bolts　is　reduced,　the　specimens　mainly　dissipate　energy　by　the　slip　of　FCPs,　and　the　load　carrying　capacity　will　descend.　Excessive　bolt　spacing　at　the　middle　row　will　reduce　the　load　carrying　capacity　and　energy　dissipation　capacity.