coke oven coke pushing operation is the core of the coke oven four cart operation, its coke pusher, blocking coke car, coke quenching car three car coordination determines the operational safety smoothly according to the coke pushing, in this paper, design and development of coke oven three interlocking control device, can ef ectively solve the problem of coke pushing homework without interlock, greatly enhance the security of coke pushing operation, stop for stop coke car, coke quenching car not ready the pusher to major accidents, such as red ground, locomotive burned interlock control system is a set of mature.