Abstract: In order to obtain the factors affected flue gas desulfurization of activated coke, the simulated experiment of flue gas desulfurization was carried out in a fixed-bed adsorption column packed with activated coke made by our laboratory.The authors studied the influence of bed temperature, oxygen concentration, steam con centration, space velocity and regeneration times of the activated coke on the desulfurization efficiency and sulfur capacity of the activated coke.The results showed tha t when the bed temperature was 80。C，the oxygen concentration was between 3% to 4%, the steam concentration was 12% and the space velocity was 2 500 h-1, the d esulfurization efficiency and sulfur capacity of the activated coke reached the best values which were 93.7% and 4. 9% respectively.When the regeneration times of the activated coke was less than four, the change of the desulfurization rate of the activated coke was relatively small.The desulfurization rate of the activated coke would d ecrease greatly when the regeneration times were more than four.