In order to meet the requirement for ultra-low coke oven flue gas emission,active coke desulfurization and denitrification technologies are adopted for 7.63 m coke oven in Masteel.In this paper,analysis is made to the problem of regenerating fan and abnormal temperature of the active coke based on actual operations of coke oven and active coke desulfurization and denitrification.Improving measures are also taken with good results.