To control early-age shrinkage induced cracking for concrete with equivalent compressive strength， four concrete mixtures were prepared with co-addition of expansion agent （HP-CSA） and internal curing water introduced by superabsorbent polymer （SAP）， both of them at the rate of 0%， 4.5%， 6.0% and 9.0% by mass to the dosage of total cementitious materials. The regulation effect of "HP-CSA+SAP" combination on early-age shrinkage of concrete was experimentally investigated. The relationships between shrinkage， mechanical strength， internal relative humidity and water loss rate during drying of concrete were analyzed. The test results show that the developments of early-age shrinkage and internal relative humidity of concrete both follow a two-stage rule. The more the dosage of "HP-CSA+SAP" combination， the better the controlling effect on early-age concrete shrinkage， especially in shrinkage developing stage I. However， as the net drying shrinkage of concrete could not be completely eliminated in 28 d， the influence of the combination dosage of "HP-CSA+ SAP" on the development of early-age internal humidity of concrete is relatively small. The net drying shrinkage of concrete is positively linearly correlated to the water loss rate within 28 d. Considering the performances in shrinkage reducing， strength retention and cost-effectiveness， 6.0% is considered to be the optimal dosage of "HP-CSA+SAP" combination.