LiOH·H_2O and Zr(NO_3)_4·5 H_2O was used as the main raw material, when the molar ratio was 2.0, we can make high pure Li_2ZrO_3 by crystallization method. When the calcination temperature was 1123 K, Li_2ZrO_3 mainly exist in the monoclinic phase. In the experiment of CO2 simulation absorption, when the reaction time was 42 min, temperature was 517 ℃, pressure was 2.0 MPa, the absorption of CO2 by Li_2ZrO_3 went to the peak, the weight of Li_2ZrO_3 mass increased by 9.2%.