Abstract: Under the background of carbon neutral, the development and application of CO2 capture and storage technology is urgent. Ca-based adsorbents are good carbon capture adsorbents with strong CO2 capture ability and high adsorption capacity, however, their recycling performance needs to be improved. In order to improve the cycling performance of Ca-based adsorbents, magnesium/yttrium (Mg/Y) modified Ca-based adsorbents were prepared by sol-gel self-propagating combustion method, characterized by XRD and SEM characterization, investigated the thermogravimetric analyzer and fixed bed cycle adsorption experiment under the high temperature of 700 ℃. The adsorption performance and cycle stability of modified Ca-based sorbents were researched. The results show that among the Mg-doped Ca-based adsorbents, when the mass ratio of Ca to Mg is 8∶2, the adsorbent has the best performance, and the adsorption capacity of CO2 in the first cycle is up to 0.60 g/g (based on adsorbent). It decays to 0.49 g/g after 15 cycles, which is better than that of the undoped Ca-based adsorbents. Studies on Mg and Y-doped Ca-based sorbents show that the initial adsorption capacity of Ca/Mg sorbents is higher than that of Ca/Y sorbents, but the cycling performance of Ca/Y sorbents is significantly improved. The adsorption and cycling properties of Ca-based adsorbents modified by double doping (Ca/Mg/Y) and single doping (Ca/Mg, Ca/Y) were compared while the mass fraction of CaO in the adsorbent was maintained at 80%. The results show that Ca/Mg adsorbent has the highest initial adsorption capacity of 0.60 g/g, which decays to about 0.54 g/g after 5 cycles and 0.49 g/g after 15 cycles. The adsorption capacity of Ca/Y adsorbent maintains at about 0.52-0.58 g/g within 15 cycles. The adsorption capacity of Ca/Mg/Y adsorbent increases from 0.50 g/g to about 0.56 g/g for 5 cycles, and the adsorption capacity increases significantly with the increase of cycles. The cycling performance of Ca-based adsorbent is improved after doping, and the effect of Y is better than Mg.