This　study　used　granulated　blast　furnace　slag,　steel　slag,　red　mud,　calcined　gypsum　and　a　small　amount　of　self-synthesized　activator　CH　(made　by　mixing　multiple　valence　states　of　alkali)　and　NS　(made　by　mixing　various　soluble　sulfates　and　halogen　salts)　to　prepare　multivariate　solid　waste　cementitious　materials　(MSWCM)　to　solidify　sand　washing　residue　mud.　The　effects　of　chemical　activator　type,　cementitious　material　content　and　curing　temperature　(20　and　40　℃)　on　the　compressive　strength　and　microstructure　of　the　solidified　body　of　sand　washing　residue　mud　were　studied　by　XRD,　MIP　and　SEM.　The　water　stability　and　heavy　metal　leaching　characteristics　were　evaluated.　The　results　show　that　the　MSWCM　with　addition　of　CH　has　the　best　curing　effect　on　the　sand　washing　residue　mud.　When　the　curing　temperature　and　the　content　of　MSWCM　are　40　℃　and　40%,　the　7　d　compressive　strength　can　reach　5.　57　MPa,　and　the　softening　coefficient　is　0.　88.　The　solidification　effect　of　sand　washing　residue　mud　is　the　worst　for　MSWCM　with　addition　of　NS,　because　of　the　lack　of　a　high　alkaline　environment,　which　weakens　the　leaching　of　calcium　and　aluminum,　reducing　the　generation　of　C-S-H　and　ettringite,　and　has　a　high　porosity.　The　use　of　MSWCM　with　addition　of　CH-NS　reduces　the　compressive　strength　of　sample　due　to　the　formation　of　excessive　expansion　product　AFt.　By　increasing　the　content　of　MSWCM　and　curing　temperature,　the　compressive　strength　of　solidified　body　of　sand　washing　residue　mud　increases.　The　7　d　compressive　strength　of　solidified　body　of　sand　washing　residue　mud　at　40　℃　can　be　increased　by　169.　08%　compared　with　the　7　d　compressive　strength　at　20　℃　by　MSWCM　with　addition　of　CH.　In　addition,　the　leaching　content　of　heavy　metals　(iron,　manganese,　titanium)　in　the　solidified　body　of　sand　washing　residue　mud　meets　the　environmental　protection　requirements.　©　2025　Bulletin　of　the　Chinese　Ceramic　Society　Press.　All　rights　reserved.