The　mechanical　response　of　reinforced　concrete　(RC)　under　the　combined　action　of　fire　and　strain　rate　differs　from　that　under　static　load　and　room　temperature,　which　in　turn　affects　the　performance　of　bond-slip　between　the　reinforcement　and　concrete.　Therefore,　the　combined　effects　of　the　strain　rate　and　fire　on　the　bond　perfor-mance　of　RC　specimens　were　discussed　by　a　3D　mesoscale　simulation　model.　In　this　simulation　model,　the　non　-homogeneity　of　concrete　and　the　external　geometric　properties　of　deformed　reinforcement　were　considered.　The　validity　of　a　mesoscopic　simulation　model　was　verified　through　the　successful　reproduction　of　the　experiment.　On　this　basis,　reinforced　concrete＇s　post-fire　dynamic　bond　performance　was　analyzed.　The　difference　between　dynamic　bonding　properties　during　high　temperature　and　after　cooling　down　was　analyzed.　A　prediction　model　for　dynamic　bond　properties　was　developed　considering　temperatures　and　strain　rate.　It　is　found　that　the　mesoscale　simulation　model　can　demonstrate　the　process　of　cracking　and　the　mechanism　of　failure　for　the　interface　bond.　The　ultimate　slip　is　positively　correlated　with　the　temperature　or　strain　rate　increased.　When　the　specimen　experiences　the　same　temperature,　the　bond　strength　increases　with　the　increase　of　strain　rate.　However,　the　bond　strength　is　weakened　by　high　temperatures　at　a　given　strain　rate.　The　bonding　performance　at　high　temperatures　of　the　specimens　is　significantly　worse　than　that　after　cooling　conditions　from　the　target　temperature.　Finally,　the　formula　proposed　can　effectively　predict　the　post-fire　dynamic　bonding　properties　of　RC　specimen.