In this paper,activated carbon was modified by being immersed in wastewater contained manganese under laboratory conditions,and the basic adsorption capability of the modified activated carbon had been determined.The value of iodine adsorption of the original activated carbon was 95.07 mg/g and SO2 adsorption capacity was 95.51 mg/g,respectively.After immersed in wastewater contained manganese in different days,the value of iodine adsorption of the modified activated carbon were 118.43 mg/g(one day),118.36 mg/g(two days),160.69 mg/g(three days) and 133.17 mg/g(four days),respectively.The SO2 adsorption capacity were 149.53 mg/g(one day),122.14 mg/g(two days),117.12 mg/g(three days) and 110.09 mg/g(four days),respectively.The results show that after modified the surface chemical properties of activated carbon immersed in wastewater contained manganese,the value of iodine adsorption and adsorption capacity of activated carbon have been improved,and the wastewater contained manganese was reused at the same time.