Engineered　Cementitious　Composites(simplied　as　ECC)　have　excellent　deformation　properties　and　crack-resistance　ability.　Experimental　study　and　theoretical　analysis　on　bending　performance　of　high-strength　reinforced　ECC　beams　are　conducted　and　compared　with　reinforced　concrete　beams.　The　results　show　that　HRECC　beam　bearing　capacity　formula　according　to　the　simplified　tension　and　compression　constitutive　model　can　be　used　for　the　flexural　design.　Under　the　same　reinforcement　ratio,　the　bending　bearing　capacity　of　HRECC　beams　is　much　higher　than　that　of　RC　beams,　but　with　multi-crack　propagation.　With　yielding　of　high　strength　rebar,　crack　width　of　ECC　beams　is　less　than　0.09　mm,　which　is　far　less　than　the　specification　limits　on　the　beam　cracks.　The　ductility　of　HRECC　beams　are　improved　much　than　RC　beam.　High-strength　rebars　can　be　used　in　reinforced　ECC　and　fits　well　with　ECC.　The　bearing　capacity　formula　for　HRECC　beams　is　established　and　the　experimental　values　of　bending　bearing　capacity　for　HRECC　beams　agree　well　with　the　theoretical　values.