Quasi-static　tests　on　three　full-scale　specially　shaped　columns　with　T-shaped　section　to　steel　beam　connections　were　conducted　under　low　cycle　load　reversals　to　study　the　behavior　of　exterior　beam　to　column　connections　of　multi-story　or　high　rise　buildings　in　high　seismic　regions.　The　deformation　characteristics,　strain　distribution　and　the　failure　mode　were　investigated.　The　hysteretic　loops,　skeleton　curves,　bearing　capacity,　shear　deformation　of　panel　zone,　rotation,　ductility　and　energy-dissipation　were　obtained.　The　effect　of　the　thickness　of　panel-zone　was　studied.　Test　results　indicate　that　the　steel　specially　shaped　column　with　T-shaped　section　to　steel　beam　connection　has　strong　and　stable　bearing　capacity,　excellent　plastic　rotational　performance,　good　ductility　and　energy-dissipation　capacity.　The　typical　failure　mode　is　the　local　buckling　with　sufficient　plastic　deformation.　The　plastic　hinge　can　be　fully　developed　at　the　beam　sections　far　away　from　the　welds　of　the　column-to-beam　joint.　Analysis　result　shows　that　steel　specially　shaped　column　with　T-shaped　section　to　steel　beam　connection　can　be　used　in　regions　of　high　seismicity.　This　study　can　provide　background　for　practical　engineering　application　and　design　specification　for　steel　structures　with　specially　shaped　columns.