In the process of flue gas desulfurization of float glass kiln,a large amount of solid waste is collected,mainly CaSO3 and CaSO4,which is difficult to recover and waste resources.Through elaborating the theoretical basis of desulfurization ash recycling,calculating and analyzing the feasibility of all desulfurization ash recycling,through specific laboratory research and practical application in the production line,the methods and precautions of desulfurization ash recycling in the ordinary float glass production line are summarized.