In　order　to　study　the　seismic　behaviors　of　special-shaped　CFT　mega　bifurcate　columns　coupled　with　multiple　cavities　in　different　cross　sectional　direction,　five　specimens　were　tested　under　a　twice　repeated　horizontal　low　cyclic　load.　In　the　tests,　three　types　of　loading　directions　were　considered,　including　long　axial,　short　axial　and　45　degree　directions.　And　there　are　two　types　of　joint　core　region　constructions　including　a　basic　one　and　an　enhanced　one　by　increasing　the　quantity　of　steel　tube　cavities.　The　test　results　show　that　the　arrangement　of　welding　seams　leads　the　failure　trend　under　accumulated　damage.　The　failure　features　appear　as　steel　plate　tearing　caused　by　crazing　and　extending　of　welding　seams　at　the　lower　horizontal　partitioning　steel　plate　of　lower　columns.　The　specimens　in　long　axis　possess　higher　bearing　capacity,　stiffness,　deformability　and　energy　dissipating　ability　than　those　in　short　axis,　while　the　specimens　in　45　degree　directions　take　the　middle　seismic　performance.　The　enhanced　construction　can　increase　bearing　capacity,　stiffness　and　energy　dissipating　ability　in　some　degree.　The　bearing　capacity　degradation　is　slight　under　the　same　repeated　load.　The　upper　columns　are　the　main　parts　of　deformation　and　energy　dissipation,　and　the　proportion　is　between　60%　and　70%.　Each　specimen　possesses　good　elastic-plastic　deformability,　and　can　be　used　in　the　seismic　design　of　mega　frame　structures　in　super　high-rise　buildings.　©　2018,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.