To　study　the　effect　of　CaO/SiO2　and　Al2O3/SiO2　ratios　on　the　chloride　permeability　of　one-part　alkali-activated　nickel　slag　(AANS)　concrete,　the　chloride　ion　electromigration　coefficient　and　the　distribution　of　total　chlorine　concentration　at　different　permeability　depths　of　the　one-part　AANS　concrete　were　investigated.　The　ratio　of　CaO/SiO2　and　Al2O3/SiO2　of　cement　were　designed　in　the　range　of　0.85–1.3　and　0.3–0.75,　respectively.　The　reaction　product　and　pore　structure　of　paste　were　analyzed.　The　Results　showed　that　the　total　chloride　ion　concentration　in　concrete　first　decreased　and　then　increased　with　CaO/SiO2　and　Al2O3/SiO2　ratios　increasing.　The　chloride　permeability　of　the　concrete　with　CaO/SiO2　of　1.0　and　Al2O3/SiO2　of　0.45　was　the　lowest,　as　the　hydration　degree　of　the　concrete　was　the　highest,　which　effectively　optimized　the　pore　structure.　The　chloride　ion　migration　coefficient　of　concrete　decreased　with　porosity,　and　an　exponential　relationship　was　observed　between　the　chloride　ion　migration　coefficient　with　porosity.　©　2023　Elsevier　Ltd