Abstract: Heating furnace is the core of the coking unit, which plays a vital role in production. In view of the gradually shortened coking furnace operation cycle, the influence factors of feed property, furnace temperature, operation load, terminal temperature fluctuations of the heat exchanger and heating condition adjustment range were analyzed. It is concluded that all the above mentioned factors can significantly affect the furnace cycle. Based on the discussion, some improvement measures are proposed, like the adding material buffer tanks and mixers, strengthening the cold slag property analysis, constanting the terminal temperature, controlling the production load and smoothing the operation. After the implementation of above measures, the rate of coke formation effectively slows down and the furnace operation cycle is prolonged. The economic benefits of about 6.09 million Yuan per year are realized.