Abstract: A novel carbon from activated sludge modified by flour was prepared.The preparation process includes mixing,fermenting,baking,KOH impregnation and carbonization at 1000℃.Specific surface area and morphology of carbon were characterized by specific surface area,pore size analyzer (BET) and Scanning Electron Microscope (SEM),and the adsorption property was explored by UV-visible spectrophotometer (UV).The results are as follows:(1)the carbon with irregular multi-model hierarchical porosity has numerous pores;(2)after KOH activation,the pore volume and the specific surface area of carbon are up to 0.43 cm³/g and 648.2 m²/g,respectively;(3)dye removal efficiency of the carbon is above 90%.