The　influence　of　amino-ternary　alcohol　(ATA)　on　the　strength　development　and　hydration　of　composited　cementitious　system　incorporated　with　steel　slag-granulated　blast　furnace　slag　(GBFS)　was　investigated.　The　mechanical　and　hydration　properties　of　steel　slag-GBFS　blend　cementious　system　in　the　presence　of　triethanolamine　(TEA),　triisopropanolamine　(TIPA)　and　diethanol-isopropanolamine　(DEIPA)　were　analyzed　by　mortar　experiment,　hydration　heat　release,　X-ray　diffraction　(XRD),　differential　scanning　calorimetry-thermogravimetry　(DSC-TG)　and　scanning　electron　microscopy　(SEM),　respectively.　The　results　show　that　the　promoting　effect　of　ATA　on　the　hydration　of　steel　slag-GBFS　cementitious　system　is　related　to　the　numbers　of　methyl　on　the　branched　chain　of　ATA.　A　few　numbers　of　methyl　can　favor　the　strength　development.　The　compressive　strength　of　blend　cementious　system　is　promoted　by　ATA,　among　which　TEA　leads　to　the　maximum　compressive　strength　at　different　ages.　The　addition　of　ATA　can　enhance　the　hydration　of　steel　slag　and　GBFS　via　increasing　the　heat　flow　at　early　age　and　decreasing　the　content　of　portlandite　(CH)　to　form　a　more　compacted　structure.　The　addition　of　ATA　has　a　positive　effect　on　the　strength　development　of　composited　cementitious　system.　©　2017,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.