In　order　to　assess　residual　behavior　of　concrete-filled　steel　tubular　(CFST)　members　after　high　temperature,　especially　residual　bearing　capacity　of　CFST　members　subjected　to　biaxial　force　and　bending,　14　rectangular　CFST　specimens　are　subjected　to　biaxial　eccentric　compression　in　this　paper.　Some　parameters,　i.e.,　strength　of　steel　and　concrete,　fire　duration,　confining　coefficient,　slenderness　ratio,　eccentric　ratio,　height-to-width　ratio,　and　steel　content,　are　discussed　by　numerical　analysis.　The　analytical　results　show　that　fire　duration,　slenderness　ratio　and　height-to-width　ratio　are　the　main　factors　influencing　on　residual　behavior.　On　basis　of　numerical　analysis　and　experimental　results,　a　simplified　formula　is　proposed　to　forecast　the　reduction　coefficient　of　residual　bearing　capacity　for　rectangular　CFST　members　after　high　temperature　subjected　to　biaxial　force　and　bending.　The　forecasting　values　are　compared　with　those　of　experimental　and　numerical　analysis　results　finally.　The　results　show　that　a　good　agreement　is　in　the　proposed　formula　values　and　experimental　results　as　well　as　numerical　analysis　ones.