An　I-section　steel　reinforced　concrete　(　SRC　)　column　with　concealed　double　steel　plates　was　put　forward　in　this　paper.　Three　1/10　scaled　column　models　with　different　constructions　we　e　tested　under　horizontal　low　cyclic　loading.　In　order　to　resurch　their　flexural　behavior　we　took　the　shear-span　ratio　λ　=2.94.　Model　1　is　a　conventional　I-section　SRC　column　from　a　column　in　a　project　with　large　space　at　the　bottom　floor;　Model　2　is　an　I-section　SRC　column　with　its　outer　part　at　the　bottom　of　flange　welded　with　steel　plates;　Model　3　is　an　I-section　SRC　column　with　its　surrounding　part　at　the　bottom　of　flange　strengthened　with　steel　bar.　The　load-bearing　capacity,　stiffness　and　degradation　process,　ductility　and　hysteretic　energy　dissipation　capacity　and　failure　characleristics　of　the　models　were　analyzed.　The　load-bearing　capacity　calculation　formula　for　cross　section　of　bottom　strengthened　I-section　SRC　column　was　given,　and　the　results　obtained　from　the　calculation　are　in　good　agreement　with　those　from　the　experiments.　The　study　shows　that　the　load-bearing　capacity,　ductility　and　seismic　energy　dissipation　capacity　of　the　bottom　strengthened　I-section　SRC　column　are　improved　obviously　compared　with　the　conventional　I-section　SRC　column.