The embodiment of the invention relates to a heat-radiation system for communication equipment. The heat-radiation system for communication equipment is disclosed, wherein the communication equipment comprises a computer case, network plates, service boards, a backboard and high-speed cables. The computer case is used to accommodate the network plates, the service boards, the backboard and the high-speed cables. The backboard is vertically inserted in and disposed at a middle part or a middle rear part of the computer case and parallel to a front side of the computer case, the service boards and the network plates are connected at the front side of the backboard in a parallel manner, and the high-speed cables are connected between the network plates and the service boards at a back side of the backboard. The heat-radiation system further comprises a plurality of fans installed on a back side of the computer case in a form of an array, and vent holes penetrating the backboard. According to the embodiment of the invention, a space for routing of the high-speed cables is formed through specially designed fan arrangement, so, on one hand, the space utilization rate in the computer case of the communication equipment is raised, and on the other hand, the heat-radiation efficiency of the communication equipment is improved.