Bolted　connections　are　suitable　to　be　applied　in　prefabricated　structures　and　seismic　resilient　structures.　A　series　of　bolted　flange　splicing　joints　were　proposed　for　square　concrete-filled　steel　tubular　columns,　and　six　full-scale　specimens　with　different　flange　thickness　and　flange　stiffener　layouts　were　designed　and　tested　under　cyclic　loads　to　study　the　seismic　performance.　The　stiffness,　the　ductility,　the　bolt　tension　forces,　the　strain　distributions　and　the　hysteretic　behaviors　of　the　joints　were　analyzed.　Finite　element　models　were　established　and　validated　by　the　test　results,　further　analyzing　the　joint　performances.　According　to　the　results,　the　joints　with　flange　stiffeners　or　thicker　flange　plates　could　develop　larger　resistance,　stiffness　and　rotational　capacity.　The　joint　yield　moments　would　increase　with　the　increase　of　the　bolt　diameter,　the　stiffener　height　or　the　stiffener　thickness,　and　decrease　when　the　distances　between　the　bolts　and　the　column　walls　increase.　Parametric　analysis　of　the　joint　was　conducted,　and　calculation　methods　of　the　joint　yield　moment　were　proposed　accordingly　and　validated　by　the　test　and　finite　element　analysis　results,　providing　satisfactory　accuracy.