A　novel　shop-welded　joint　for　H-beam　to　concrete-filled　steel　tubular　column　with　field-bolted　flange　splicing　used　in　prefabricated　steel　structure　is　proposed.　Four　full-scale　specimens　were　tested　under　cyclic　loads,　and　the　effects　of　bolt　diameter,　beam　flange　cover　plate,　widened　beam　flange　at　the　end,　and　the　flange　thickness　on　the　seismic　performance　of　joints　were　studied　by　experiments　and　numerical　simulation.　The　seismic　performance　of　the　shop-welded　joint　is　compared　to　that　of　traditional　welded　joints.　According　to　the　results,　the　beam　flange　thickened　by　welding　cover　plate　and　widened　by　welding　plate　at　the　beam　end　can　improve　the　yield　resistance,　ultimate　resistance,　stiffness,　ductility,　and　energy　dissipation　capacity　of　the　joint,　while　the　bolt　diameter　and　the　flange　thickness　did　not　make　significant　influences.　The　shop-welded　joints　could　be　regarded　as　rigid.　Adding　cover　plate,　widening　beam　flange,　or　increasing　column　base　flange　thickness　can　effectively　reduce　the　beam　end　stress　and　avoid　brittle　failure　of　welds　under　rare　earthquakes.　Simplified　formulas　for　the　yield　and　ultimate　loads　of　the　shop-welded　joint　were　proposed.