Abstract: Li₂ZrO₃ is an efficient high-temperature CO₂ solid adsorbent. However, the synthesis method significantly impacts its CO₂ adsorption performance. Li₂ZrO₃ was synthesized using sol-gel method, high-temperature solid-phase method, and crystallization method, aiming to thoroughly investigate the influence of the preparation methods on the CO₂ adsorption performance of Li₂ZrO₃. Characterization analysis of Li₂ZrO₃ material was conducted using XRD, SEM, and N₂ adsorption-desorption to study the crystal structure, surface morphology, and pore structure characteristics. Thermal gravimetric analysis （TGA） was employed to measure the adsorption rate, adsorption capacity, and adsorption stability of Li₂ZrO₃ material towards CO₂. The results indicate that Li₂ZrO₃ prepared via the sol-gel method exhibits well-developed pores, strong CO₂ adsorption capabilities, and even after 6 cycles of CO₂ adsorption and desorption, it can maintain an increase in weight of 20.88%.