Abstract: The sludge from activated sludge treatment of domestic sewage was the main material mixed with blast furnace slag and bagasse and ironmaking clinker and fly ash as accessory ingredients based on the quantity ratio of 53%∶20%∶13%∶7%∶7%to prepare sorbent under the condition of zinc chloride activation and high temperature carbonization. The tests were conducted by changing impregnation ratio, carbonization temperature to explore the optimal preparation condition. The results showed that the prepared sorbent had good absorption efficiency as 89.87% on cadmium metal under the condition of impregnation ratio as 1∶1.5with the carbonization temperature as 850 centigrade.