To　study　the　mechanical　properties　and　design　method　of　CFST　columns　with　special-shaped　cross-section,　based　on　the　special-shaped　multi-cell　CFST　bifurcated　columns　of　a　super-high　building　under　construction　in　Beijing,　the　FEM　analysis　on　the　seismic　behavior　of　the　special-shaped　concrete-filled　bifurcated　steel　tube　columns　was　carried　out.　The　test　parameters　were　the　different　constructional　measures,　different　steel　and　concrete　grades.　The　results　show　that　the　developed　FEM　analysis　method　has　adequate　accuracy　compared　with　the　test　results.　The　seismic　behavior　of　the　columns　increased　with　increasing　the　number　of　the　cells,　the　installation　of　the　stiffener,　L-type　steel　and　steel　tube.　Increasing　the　number　of　the　cavities　has　a　better　effect　on　seismic　behavior　than　the　increasing　thickness　of　the　steel　tube　in　the　case　of　the　same　steel　consumption.　The　materials　strength　has　a　great　influence　on　the　seismic　performance　of　the　bifurcated　column,　and　the　strength　matching　between　the　steel　and　concrete　should　be　considered　in　seismic　design.　©　2017,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.