In　this　research,　Ni-Fe　slag　powder　and　mineral　powder　are　blended　into　mineral　admixtures　and　added　to　soil　cement,　with　the　aim　of　investigating　the　mechanical　property　of　soil　cement　under　a　dynamic　environment,　and　the　dynamic　properties　of　Ni-Fe　slag　powder　soil　cement　after　impact　compression　are　obtained　by　conducting　split-Hopkinson　pressure　bar　(SHPB)　test.　The　results　show　that　under　the　same　age　and　different　admixture　conditions,　the　dynamic　stress　of　Ni-Fe　slag　powder　soil　cement　increases　first　and　then　decreases　and　reaches　the　maximum　when　the　admixture　ratio　is　40%,　and　the　dynamic　stresses　at　7　d,　28　d　and　60　d　were　5.10　MPa,　9.73　MPa　and　13.51　MPa,　respectively.　Under　the　same　admixture　ratio,　Ni-Fe　slag　powder　soil　cement　shows　an　increasing　trend　in　dynamic　stress　with　age,　and　its　growth　rate　at　the　curing　age　from　7　d　and　28　d　is　significantly　higher　than　that　at　the　curing　age　from　28　d　to　60　d.　After　comparison,　it　is　concluded　that　the　best　admixture　ratio　for　Ni-Fe　slag　powder　is　40%,　which　is　close　to　the　maximum　value　of　45%　for　mineral　admixtures　to　replace　cement　as　specified　in　the　national　standard.