Concrete-filled　steel　tubular　(CFST)　beam　with　corrugated　steel　web　is　a　new　steel-concrete　composite　structure,　in　which　corrugated　steel　web　is　used　to　connect　the　upper　and　lower　CFST　chords.　Experiment　research　on　this　new　composite　structure　is　introduced.　Based　on　the　experiment　results,　a　3-D　finite　element　model　is　presented.　Using　ANSYS　Program,　dual-nonlinear　finite　element　analyses　for　the　tested　specimens　are　conducted.　The　analysis　result　achieves　good　agreement　with　that　of　the　experiment.　The　deformation,　strain　and　failure　mode　are　studied,　and　the　effect　of　filled　concrete　on　the　mechanical　behavior　are　compared.　It　shows　that　the　load　carrying　capacity　increases　with　fills　of　concrete　into　the　tube.　Compared　with　the　hollow　steel　tube,　filled　concrete　into　the　upper　tube　improve　the　load　carrying　capacity　great.　The　longitudinal　strain　in　the　steel　web　is　considerably　small　compared　with　the　upper　and　lower　tube,　so　its　contribution　to　the　bending　resistance　can　be　ignored.