Abstract: A new process of flue gas desulfurization is introduced，and its mechanism of desulfurization and decarburization，and SO₂ removal efficiency are presented. Some points of this process and the environment benefits are also summarized. All reactions，including oxidation，absorption of SO₂，gypsum crystallization and carbonization，absorption of CO₂，are completed in the brick kiln. Finally，both desulfurization and decarburization efficiency are as high as 99%. In comparison with other methods of desulfurization，this process combines desulfurization and carbon brick making，which can bring in highly commercial value.