A　central　pullout　test　was　conducted　to　investigate　the　bonding　properties　between　high　strength　rebar　and　reactive　powder　concrete　(RPC),　which　covered　ultimate　pullout　load,　ultimate　bonding　stress,　free　end　initial　slip,　free　end　slip　at　peak　load,　and　load-slip　curve　characteristics.　The　effects　of　varying　rebar　buried　length,　thickness　of　protective　layer　and　diameter　of　rebars　on　the　bonding　properties　were　studied,　and　how　to　determine　the　minimum　thickness　of　protective　layer　and　critical　anchorage　length　was　suggested　according　the　test　results.　The　results　prove　that:　1)　Ultimate　pull　out　load　and　free　end　initial　slip　load　increases　with　increase　in　buried　length,　while　ultimate　bonding　stress　and　slip　corresponding　to　the　peak　load　reduces.　When　buried　length　is　increased　from　3d　to　4d(d　is　the　diameter　of　rebar),　after　peak　load,　the　load-slip　curve　descending　segment　declines　faster,　but　later　the　load　rises　again　exceeding　the　first　peak　load.　When　buried　length　reaches　5d,　rebar　pull　fracture　occurs.　2)　As　thickness　of　protective　layer　increases,　the　ultimate　pull　out　load,　ultimate　bond　stress,　free　end　initial　slip　load　and　the　slip　corresponding　to　the　peak　load　increase,　and　the　descending　section　of　the　curve　becomes　gentle.　The　recommended　minimum　thickness　of　protective　layer　for　plate　type　members　should　be　the　greater　value　between　d　and　10　mm,　and　for　beams　or　columns　the　greater　value　between　d　and　15　mm.　3)　Increasing　the　diameter　of　HRB500　rebars　leads　to　a　gentle　slope　in　the　descending　segment　of　the　pullout　curve.　4)　The　bonding　properties　between　high　strength　steel　HRB500　and　RPC　is　very　good.　The　suggested　buried　length　for　test　determining　bonding　strength　between　high　strength　rebars　and　RPC　is　4d　and　a　formula　to　calculate　the　critical　anchorage　length　is　established.　The　relationships　between　ultimate　bonding　stress　and　thickness　of　protective　layer　or　the　buried　length　was　obtained.