The coal suitable for the preparation of agglomerated activated carbon was selected, and controlling ash content at the source without using post-treatment deash, the activated carbon samples with high iodine number and low ash content were prepared. Three kinds of coal from different areas were selected as raw materials, and activated carbon was prepared by the method of coal blending and forming. The performance of activated carbon was studied with iodine number, hardness and ash content as the main evaluation indexes. The results show that activated carbon samples with American standard iodine number ≥1 100 mg/g, American standard hardness ≥90% and ash content ≤10% can be prepared under the conditions of final carbonization temperature at 550℃ and activation at 900℃ for 3.5 h when the ratio of coal C to coal B is 5∶0, 4∶1, 1∶1 and 1∶4, respectively. When the ratio is 5∶0, the American standard iodine number of the prepared sample reaches 1 223 mg/g, American standard hardness reaches 95%, and ash content is only 5.46%.