To　explore　the　influence　of　the　substitute　rate　of　recycled　coarse　aggregate　(RCA)　and　strain　rate　on　the　discreteness　of　the　compressive　strength　of　recycled　aggregate　concrete　(RAC),　RAC　specimens　with　three　different　RCA　substitute　rates　were　prepared　for　both　quasi-static　compression　and　split　Hopkinson　pressure　bar　(SHPB)　tests.　The　test　results　show　that　despite　the　limited　change　in　the　discreteness　of　compressive　strength　of　RAC　with　increasing　RCA　substitution　rate,　it　still　tends　to　initially　increase　and　then　decrease　as　the　RCA　substitution　rate　increases.　The　results　of　the　SHPB　test　indicate　that　both　the　RCA　substitute　rate　and　the　strain　rate　exert　a　significant　influence　on　the　variability　of　the　dynamic　compressive　strength　of　RAC.　The　dynamic　compressive　strength　discreteness　of　RAC　with　the　same　RCA　substitute　rate　gradually　decreases　with　increasing　strain　rate,　while　it　increases　with　increasing　RCA　substitute　rate　under　the　same　strain　rate.　In　addition,　the　traditional　Weibull　distribution　model　was　modified　by　introducing　the　parameters　of　RCA　substitute　rate　and　strain　rate,　and　a　dynamic　compressive　strength　prediction　formula　for　RAC　with　different　RCA　substitute　rates　at　any　given　probability　level　was　proposed.　©　2024　Beijing　University　of　Aeronautics　and　Astronautics　(BUAA).　All　rights　reserved.