To　investigate　the　bond　behavior　and　constitutive　relationship　at　the　interface　between　steel　bars　and　recycled　concrete,　15　beam-type　specimens　were　designed　to　test　the　bond-slip　behavior　of　reinforced　recycled　concrete.　The　design　parameters　included　recycled　coarse　aggregate　substitution,　recycled　fine　aggregate　substitution,　steel　bar　shape,　steel　bar　diameter　and　anchorage　length.　The　influence　of　the　above　variables　on　the　load-slip　curves,　bond　strength　and　bond　efficiency　coefficient　between　steel　bars　and　recycled　concrete　was　analyzed　synthetically,　and　the　bond-slip　constitutive　relationship　was　proposed.　The　results　show　that:　with　the　increase　of　recycled　coarse　aggregate　replacement　ratio,　the　bond　strength　between　steel　bars　and　concrete　decreases;　however,　the　anti-slid　ability　increases.　The　recycled　fine　aggregate　addition　makes　the　bond　behavior　become　weaker　significantly.　The　bond　strength　between　deformed　bars　and　recycled　concrete　is　about　2　times　of　that　between　plain　bars　and　recycled　concrete.　The　interfacial　bond　behavior　of　reinforced　recycled　concrete　becomes　poorer　with　the　increase　of　steel　bar　diameter　and　anchorage　length.　The　proposed　bond-slip　constitutive　relationship　and　parameters　of　reinforced　recycled　concrete　fit　the　experimental　results　well.　©　2017,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.