The　good　bond　between　rebar　and　concrete　is　an　essential　prerequisite　for　the　bearing　force　of　reinforced　concrete　structures.　In　the　simulation　method,　the　concrete　heterogeneity　and　rebar　characteristics　were　taken　into　account.　Considering　frictional　resistance　and　the　mechanical　interlocking　between　reinforcement　and　concrete,　the　paper　established　meso-scale　separate　interaction　model　which　researches　the　nonlinear　bonding　damage　behavior　ribbed　bar　and　concrete.　Based　on　the　good　agreement　between　the　simulation　results　and　the　experimental　results,　the　advantages　of　the　mesoscopic　mechanical　analysis　method　were　discussed　first,　and　the　bond　slip　behavior　and　failure　mechanism　of　the　reinforced　concrete　interface　were　studied.　Finally,　the　distribution　characteristics　of　the　bond　stress　of　the　bar　was　analyzed.　Furthermore,　based　on　the　mesoscopic　numerical　analysis,　the　influences　of　the　aggregate　distribution,　thickness　of　concrete　cover,　strength　of　concrete,　steel　bar　diameter　and　height　of　rib　on　the　bond　failure　behavior　of　reinforced　concrete　interface　are　discussed,　and　some　regular　knowledge　is　obtained.　©　2019,　Science　Press.　All　right　reserved.