The adsorption and decoloring of reactive brilliant red K -2BP and reactive light yellow K -4G from aqueous solution were studied in the presence of expanded graphite, and the influences of the concentrations, the dosages, pH values and the temperatures on the decoloration ratios were investigated as well. The experiment re - sults indicated that all of decoloration ratios would increase along with enhancing pH values, decreasing the con - centrations at the same pH value, enhancing the dosagesof expanded graphite and under different concentrations, and enhancing the temperatures. The influence of brilliant red K-2BP on the decoloration ratios was bigger than the one of reactive light yellow K-4G.