Strain-hardening　ultra-high　performance　concrete　(SH-UHPC)　exhibits　excellent　mechanical　properties　at　the　quasi-static　state　and　becomes　a　promising　material　for　protective　structures　exposed　to　impact　or　blast　threats.　But　its　performance　under　loads　with　high　magnitude　and　short　duration　remains　unanswered.　The　focus　of　this　study　is　to　investigate　the　dynamic　compressive　properties　of　SH-UHPC　under　high　strain　rates,　which　are　achieved　by　split　Hopkinson　pressure　bar　(SHPB)　tests.　SH-UHPC　with　different　fiber　contents　of　1,　1.5,　and　2　vol%　and　different　fiber　lengths　of　6,　12,　and　18　mm　are　tested.　The　considered　strain　rate　ranges　from　∼　180　s−1　to　∼　300　s−1.　The　results　show　that　SH-UHPC　exhibits　good　impact　resistance　in　terms　of　integrity.　Samples　could　remain　good　integrity　at　a　strain　rate　of　∼　240　s−1.　The　key　parameters　to　measure　the　dynamic　properties,　i.e.　energy　absorption,　dynamic　compressive　strength,　and　dynamic　increase　factor　(DIF)　of　SH-UHPC　show　strain　rate　sensitivity　and　all　of　them　increase　with　strain　rate.　Increasing　fiber　content　leads　to　a　slight　improvement　of　the　impact　resistance　of　SH-UHPC　while　reducing　fiber　length　impairs　the　impact　resistance.　Empirical　DIF　relations　of　SH-UHPC　are　firstly　proposed　in　this　study.　©　2022　Elsevier　Ltd