High-strength　reinforcement　is　characterized　with　excellent　strength　and　ductility,　and　when　combined　with　ultra-high-performance　fiber-reinforced　concrete　(UHPFRC),　it　leverages　the　strengths　of　both　materials.　To　study　the　dynamic　response　of　high-strength　reinforced　UHPFRC(HSR-UHPFRC)　beams　under　impact　loading,　this　work　integrates　drop-weight　impact　testing　with　ABAQUS　numerical　simulations　to　examine　the　effects　of　longitudinal　reinforcement　ratio,　stirrup　ratio,　impact　mass,　impact　velocity　and　shear　span-to-depth　ratio.　The　research　findings　indicate　that　under　impact　loading,　HSR-UHPFRC　beams　primarily　experience　flexural　failure.　When　the　reinforcement　ratio　increases　from　1.　15%　to　1.　53%,　the　energy　absorption　efficiency　drops　by　about　10%.　Use　of　stirrups　can　effectively　reduce　the　deflection　of　the　beam　without　altering　its　failure　mode.　Under　the　equivalent　impact　energy,　the　impact　mass　has　a　more　pronounced　effect　on　the　damage　of　beam.　Elastoplastic　rotation　damage　assessments　suggest　that　increasing　the　longitudinal　reinforcement　ratio　and　reducing　the　shear　span-to-depth　ratio　can　effectively　mitigate　the　damage　of　beam　under　impact　loading.　When　the　longitudinal　reinforcement　ratio　is　less　than　1.　15%,　a　design　without　stirrups　can　be　adopted.　When　it　exceeds　1.　5%,　however,　it　is　recommended　that　stirrups　shall　be　provided　to　prevent　brittle　failure　of　beam　under　impact　loading.　©　2025　Chinese　Society　of　Civil　Engineering.　All　rights　reserved.