The invention discloses a triple-extrusion optical fiber composite overhead insulating cable. The center of the cable is a conductor inner layer formed by stranding a plurality of stainless steel tubes and aluminum-coated steel wires or galvanized steel wires, a plurality of optical fibers are arranged in each stainless steel tube, in which optical fiber ointment is filled; a hard-drawn aluminum wire is stranded outside the conductor inner layer to form a conductor; and a conductor shielding layer, a main cross-linked polyethylene insulating layer and an outer weatherproof cross-linked polyethylene insulating layer are sequentially arranged outside the conductor, wherein the conductor shielding layer, the main cross-linked polyethylene insulating layer and the outer weatherproof cross-linked polyethylene insulating layer are molded through triple extrusion. The cable disclosed by the invention integrates the optical fibers and the electric power wires, the copper-core conductor is used for power transmission, and an optical cable is used for transmitting optical signals; when electric energy is transmitted, same-network signal transmission can be realized among a telecommunication network, a broadcast television network and an internet; and the design on circuits for transmitting the electric energy and the optical signals is optimized, the influences of repeated construction to the environment and ecological benefits can be greatly reduced, a large amount of manpower, materials resources and financial resources are saved, and moreover, the cable is simple and convenient to lay and is beneficial to space saving.