Two　alkalis　of　industrial　solid　wastes,　calcium　carbide　residue-mirabilite　(CCRM),　were　used　as　a　green　combined　activator　to　consolidate　phosphorus　tailings　and　soluble　phosphorus　as　well　as　fluorine　through　the　alkaline　activation　process.　The　results　based　on　XRD,　FTIR,　29Si　NMR　and　SEM　indicated　that　most　of　the　blast　furnace　slag　(BFS)　forms　gels　to　consolidate　phosphorus　tailings,　and　the　calcium　silicate　hydrate　(C-S-H)　gel　dominated　mechanical　properties　and　immobilization　of　soluble　phosphorus　and　fluorine.　Comparing　with　the　classical　alkaline　activators　Na2SiO3　and　NaOH,　the　CCRM　activated　materials　displayed　great　competitiveness　in　mechanical　properties　with　the　order　of　NaOH　<　CCRM　<　Na2SiO3.　Its　maximum　compressive　strength　reached　to　10.9　MPa,　and　the　compressive　strength　increased　greatly　with　certain　increasing　content　of　BFS.　In　addition,　the　toxicity　characteristic　leaching　procedure　(TCLP)　tests　found　the　consolidation　of　risky　soluble　fluorine　and　phosphorus　ions　in　the　alkaline　activation　materials　(AAMs)　presented　in　the　trend　of　CCRM　>　NaSiO3　>　NaOH,　and　the　tendency　enlarges　with　increasing　BFS　addition,　over　93.1　%　and　98.9　%　of　soluble　fluorine　and　phosphorus　ions　could　be　well　fixed.　Considering　on　the　environmental　and　economic　efficiency,　mechanical　properties,　soluble　phosphorus　and　fluorine　immobilization,　the　CCRM　is　found　a　quite　potential　solid　waste　alkali　activator　for　phosphorus　tailings　and　soluble　fluorine　&　phosphorus　solidification.　©　2022　The　Authors