Impacts　of　triethanolamine　(TEA)　on　autogenous　shrinkage,　drying　shrinkage　and　strength　development　of　cement　mortars　were　investigated.　Hydration　kinetics,　pore　structure　and　microstructure　of　hardened　cement　pastes　(hcps)　incorporated　with　TEA　were　systematically　analyzed　to　reveal　the　working　mechanism　of　TEA.　Results　show　that　TEA　at　dosages　of　0.05%,　0.10%　and　0.50%　by　weight　of　cement　increases　the　autogenous　shrinkage　of　cement　mortars　at　7d,　which　is　mainly　resulted　from　the　promoting　effect　of　TEA　on　the　secondary　hydration　of　aluminate　phases　(C(3)A　and　C(4)AF)　and　inhibiting　effect　on　the　hydration　of　the　silicate　phase　(C3S)　especially　at　0.50%　dosage.　The　morphology　change　of　CH　in　the　presence　of　TEA　may　also　accelerate　the　development　of　autogenous　shrinkage.　In　addition,　TEA　has　no　obvious　effect　on　the　drying　shrinkage　of　cement　mortars　due　to　the　similar　moisture　diffusion　trends　of　cement　mortars　with　and　without　TEA　from　7d　to　56d.　Moreover,　0.05%　and　0.10%　TEA　enhance　the　early　strength　of　cement　mortars　while　0.50%　TEA　leads　to　an　opposite　effect.　However,　0.05%,　0.10%　and　0.50%　TEA　reduce　the　late　strength　at　28d　and　56d.　Pore　structures　are　not　responsible　for　the　strength　reduction,　as　indicated　from　the　MIP　and　DVS　results.　Therefore,　it　is　believed　that　strength　reduction　may　be　resulted　from　the　incorporation　of　CH　micmcrystals　into　C-S-H　structures.