The utility model relates to a coke oven power system of discharging fume, including coke oven, coke oven chimney, gas cleaning device and fan, link to each other through the flue collector between coke oven and the coke oven chimney, be close to and establish the fan on the flue collector of coke oven, establish gas cleaning device, gas cleaning device and fan independent control on the flue collector in fan low reaches or the branch's flue. Adopt the utility model discloses afterwards, coke oven smoke discharging process relies on the fan to provide power all the time, and coke oven chimneyneed not heat and is equipped with to avoided heating up the manufacturing cost who leads to again and increasing because of coke oven chimney heat is equipped with or purifies the back flue gas, andguaranteed the continuous stability that the coke oven discharges fume.