Influence of shrinkage reducing admixture(SRA), internal curing(IC) by using saturated lightweight aggregate, and SRA combined with IC on shrinkage, cement hydration and compressive strength of cement mortar cured under sealed and drying conditions were investigated. For sealed curing, compared with SRA or IC mixtures, when the IC and SRA were used together, the autogenous shrinkage of cement mortar was significantly reduced, which was resulted from the reduction of internal relative humidity drop, a microdilatancy in length was observed in 7d age, moreover, the ultimate autogenous shrinkage of the mortar was below 100×10-6 at 28d age. On the other hand, for drying condition, compared with only using IC, the SRA can significantly enhance the drying shrinkage reduction of internally cured mortar. However, since the moisture loss of internally cured mortar was larger than that of using SRA only, the drying shrinkage of mortar with adding IC and SRA together was greater than that of adding SRA only. Nevertheless, the combination was contributed to the cement hydration and strength development of mortar compared with that of using SRA only.