This paper introduces the equipment, facilities and related technologies of the cracking furnace of the 200 kt/a ethylene plant in Tianjin. Through the analysis of the transfer line valve, low NOx emission technology and the advanced control system of the cracking furnace, some improvement measures are put forward combined with the operation of the ethylene cracking furnace in Tianjin, and the design ideas and principles of new equipment, facilities and technologies of cracking furnace are explored, which is conducive to improving the intelligent application level and operation stability of cracking furnace, so as to achieve the purposes of energy saving, consumption reduction and emission reduction and to reduce the labor intensity of the staff.