The multi-pollutant removal using activated coke (AC) in moving bed under low temperature and dry state showed great prospect in desulfurization and denitrification process of flue gas from steel sintering process. The abrasion of AC in this process was the crucial factors which restricted the wide application of this technology. Being aimed at the used AC which was produced in the process of SOx and NOx removal from Baogang sintering flue gas, the texture properties, including the specific surface area, pore volume structure, the content of heavy metals and alkali metals in ash, surface functional group characteristics and desulfurization and denitration performance of AC were investigated to obtain the formation and variation behavior of used AC. Compared to fresh AC, an obvious increase in the content of N, S and O elements and transition metal oxides were observed in the used AC powder in particle size at 0.2?5 mm, and its specific surface area also increased from 191.0 m2/g to 499.0 m2/g. As a result, the NO conversion rate increased greatly from 20% to 70% at 150℃, and the penetrating sulfur capacity was enhanced from 0.27 mg SO2/g to 11.08 mg SO2/g at 120℃. The used AC exhibited a good potentiality for reutilization.