According　to　the　characteristics　of　steel　fiber　reinforced　concrete　(SFRC)　with　high　tensile　strength　and　carbon　fiber　reinforced　plastic　(CFRP)　with　high　strength　and　light　weight,　a　composite　beam　composed　of　CFRP　plate,　SFRC　and　ordinary　concrete　(OC)　is　developed　in　the　paper.　Eight　specimens,　including　four　CSOCBs　with　different　heights　of　the　SFRC　and　four　SFRC-OC　composited　beams　with　varying　heights　of　the　SFRC,　were　tested　to　analyze　the　flexural　behavior.　The　results　show　that　the　composite　beam　composed　of　OC,　SFRC　and　CFRP　improves　the　ultimate　load　capacity　of　the　beam　under　unidirectional　load,　enhances　the　cracking　and　deformation　resistance　of　the　beam,　and　solves　the　defects　of　the　weak　tensile　capacity　of　ordinary　concrete　beams.　Applying　them　to　the　building　structure　can　improve　the　stability　of　the　structure　and　prolong　the　service　life　of　the　building.　A　prediction　model　for　the　bending　capacity　of　the　CSOCB　was　proposed　and　validated.　Based　on　the　limit　state　design　method,　the　design　formula　for　the　bending　capacity　of　the　composite　beam　is　described　in　detail　herein.