Effects of slag,high-calcium fly ash,desulfurized gypsum,calcined desulfurized gypsum and sodium sulfate on early age autogenous shrinkage of cement pastes,long terms of desiccation shrinkage and initial cracking sensitivity of cement mortar are researched.The results indicate that there are relationships between autogenous shrinkage and hydration activity of materials in cement-mineral system.The autogenous shrinkage of cement sample is higher than that of 50%(by mass) of slag or high-calcium fly ash samples.The autogenous shrinkage decreases along with the decreasing of hydration activity of minerals.Because of enhanced hydration degree,the chemical shrinkage,amount of AFt and the expansion,the sulfate active material affects the autogenous shrinkage a little.50%(by mass) of slag increases the desiccation shrinkage clearly duo to slag urge pastes to eduction and lose more water at early age.1%(by mass) of Na_2SO_4 increases the desiccation shrinkage duo to its early reinforcing and more water consumption for hydration.Both the slag and Na_2SO_4 accelerate the volume of pastes to shrinkage due to the inner desiccation.Mixing of desulfurized gypsum and calcined desulfurized gypsum in certain mixture can decrease the desiccation shrinkage significantly.The initial cracking time relates with the autogenous shrinkage and hydration activity.The more the autogenous shrinkage,the higher is the sensitivity of initial cracking.Reinforced process for cement enhances the risk of cracking usually.Replaced some of cement with equal amount of mineral material,especially the minerals with low activity,hydrating course prolongs,autogenous shrinkage and desiccation shrinkage decrease and crack-resisting performance of mortar would be improved.