Abstract: The removal of cobalt and zinc ions from the residual DMC catalyst of CO₂-based polycarbonate polyol was studied by adsorption method using CO₂-based polycarbonate polyol made by Shaanxi Coal Research Institute as raw material.The results show that when activated carbon is used as adsorbent, the adsorption effect is better.Then through further parallel experiments, the best adsorption conditions for the amount of activated carbon is carbon dioxide-based polycarbonate polyol quality of 3%.When the adsorption solvent is propylene carbonate, adsorption temperature is at 90 ℃,and adsorption time is 40 min, the removal rate of cobalt and zinc ions is the highest, reaching 81.21% and 52.63%,respectively.In summary, DMC crude CO₂-based polycarbonate polyol refining process can effectively remove residual catalysts, which has certain economic and practical significance for purifying CO₂-based polycarbonate polyol and optimizing downstream products and processes of polyol.