In　this　study,　the　mechanical　behavior　of　the　basalt-polyethylene　fiber-reinforced　concrete　(BPEFRC)　attacked　by　chloride　under　impact　loading　was　experimentally　investigated.　The　failure　mode,　dynamic　compressive　strength,　dynamic　compressive　toughness,　and　dynamic　increase　factor　of　fiber-reinforced　concrete　(FRC)　specimens　were　analyzed　by　considering　factors　such　as　strain　rates　and　polyethylene　(PE)　fiber　volume　fractions.　Based　on　the　modified　Zhu-Wang-Tang　(ZWT)　constitutive　model,　considering　the　concrete　damage,　strain　rate　effect,　and　toughening　effect,　a　damage　factor　was　introduced　to　develop　dynamic　damage　constitutive　models　for　BPEFRC.　The　results　indicated　that　BPEFRC　exhibited　superior　impact　resistance　and　deformation　capacity.　Under　chloride　attack,　improvements　were　observed　in　dynamic　compressive　strength,　toughness,　and　dynamic　increase　factor　(DIF).　BPEFRC　exhibited　better　integrity　after　quasi-static　and　SHPB　tests.　For　dynamic　compressive　strength,　with　a　fixed　BF　volume　fraction　of　0.10　%,　the　optimal　PE　fiber　volume　fraction　was　0.10　%　at　strain　rates　of　74–145　s−1　for　0–90　d.　The　optimal　PE　fiber　volume　fractions　for　dynamic　peak　and　ultimate　toughness　were　consistent,　at　0.10　%.　The　developed　dynamic　damage　constitutive　model　effectively　reflects　the　impact　resistance　of　BPEFRC　and　aligns　well　with　the　test　results.　The　results　help　evaluate　the　impact　resistance　of　BPEFRC　after　chloride　attack.　©　2025　Elsevier　Ltd