The　repeated　load　tests　of　five　recycled　coarse　aggregate　concrete　composite　beams　and　two　normal　concrete　composite　beams　were　carried　out　to　investigate　the　flexural　behavior　of　recycled　coarse　aggregate　concrete　composite　beams　with　closed-section　steel　deck.　Based　on　the　tests,　the　flexural　behavior　of　recycled　coarse　aggregate　concrete　composite　beams　with　different　shear　studs＇　layout,　slab　thickness　and　steel　shape　was　analyzed　and　compared　with　that　of　normal　concrete　composite　beams.　The　analysis　working　was　mainly　focused　on　yield　load,　ultimate　load,　deformation,　the　slippage　between　the　steel　shape　and　composite　slab　and　damage　process　of　the　composite　beams　during　the　test.　The　test　results　show　that　the　failure　modes　of　recycled　coarse　aggregate　concrete　composite　beams　and　normal　concrete　composite　beams　are　similar.　Based　on　the　experimental　results,　the　calculating　formulas　of　the　bearing　capacity　and　the　deformation　of　recycled　coarse　aggregate　concrete　composite　beams　with　closed-section　steel　deck　were　presented　with　reference　to　the　normal　concrete　composite　structure　design　code.　The　calculating　results　are　in　good　agreement　with　that　of　the　experimental　results,　so　the　calculating　formulas　can　be　used　for　designing　recycled　coarse　aggregate　concrete　composite　beams.　©　2015,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.