The purpose of this paper was to explore the effect of nano calcium aluminosilicate hydrate (C-A-S-H) and diethanol monoisopropanolamine (DEIPA) composite on the early hydration, setting time, chemical shrinkage and compressive strength of cement at different curing temperatures. The mechanism was analyzed by hydration heat, XRD, TG and SEM. The results show that after adding nano C-A-S-H and DEIPA at different curing temperatures, the hydration rate of silicate and aluminate is accelerated, more hydration products are formed in the system, and the setting time of cement is shortened. When the curing temperature is 10 ℃, the initial setting time and final setting time are shortened by 13.06% and 11.75% respectively compared with the blank group. At the curing temperature of 0, 10 and 20 ℃, the chemical shrinkage increases by 20.00%, 13.79% and 9.30% respectively compared with the blank group at age of 24 h. The compressive strength of cement mortar increases compared with the blank group. When the age is 24 h, and the curing temperature is -15, 0, 10 and 20 ℃, the compressive strength increases by 94.48%, 85.91%, 55.93% and 23.17%, respectively.