Cu?Cr modified activated carbon adsorbent was prepared by equal volume impregnation method.Using simulated coke oven gas as testing material,the effects of different transition metal active components and their loadings,different additives and loadings,calcination temperature on the removal activity of COS were investigated.The Cu?Cr modified adsorbent was characterized by X?Ray Diffraction (XRD), specific surface area (BET) and scanning electron microscope (SEM). The results show that the activated carbon modified simultaneously by Cu and Cr has the best adsorption performance of COS for coke oven gas, and the optimized preparation conditions of Cu?Cr modified activated carbon adsorbent are as follows: Cu and Cr loading is 5.0%, and 1.5% respectively, calcination temperature is 400 ℃. When the reaction temperature is 10 ℃, the breakthrough sulfur capacity of the modified activated carbon adsorbent is 1.47%, and the Cu?Cr modified activated carbon adsorbent shows good recycling performance. The characterization results indicate that CuO and Cr₂O₃ metal oxides are uniformly loaded on the activated carbon, and the specific area and pore volume of the adsorbent decrease after deactivation.