Experiment　on　two　circular　and　two　square　steel　tube　confined　high-performance　concrete　members　subjected　to　pure　bending　were　carried　out.　The　variation　of　steel　strains　along　the　section　depth　was　analyzed　and　the　plane　section　hypothesis　was　verified.　The　deflection　curves　of　steel　tube　confined　high-performance　concrete　subjected　to　pure　bending　were　demonstrated.　Numerical　method　for　analysis　of　concrete　filled　steel　tubes　under　bending　was　presented,　comparisons　of　the　load-deformation　curves　given　by　this　analysis　and　experimental　results　indicate　good　agreement.　The　initial　flexure　stiffness　and　the　service-level　flexure　stiffness　of　the　specimens　were　compared　to　the　that　of　current　design　codes,　The　applicability　of　different　code　in　calculating　flexure　abilities　of　steel　tube　confined　high-performance　concrete　were　discussed.