Based on the practice of coke oven gas purification process in coking enterprises, good production and operation conditions can not only improve the purification efficiency of coke oven gas, but also improve the recovery rate of coal tar, crude benzene and other chemical products, contributing to the economic benefits of enterprises. Therefore, the purification system of coke oven gas should be continuously analyzed and improved. Through reasonable equipment operation system, equipment maintenance, production raw material optimization and production system transformation, the follow-up gas deep processing can achieve stable operation, increased production and efficiency, and saving energy. Finally, through the reasonable optimization of the gas purification system of the system, the production cost of the enterprise can be reduced and various and the output of various chemical products can be increased, so as to increase the competitiveness of coking enterprises.