The invention discloses an extrusion-resistant composite cable. The extrusion-resistant composite cable comprises a buffering space located in the center of the cable, wherein on any one section, the buffering space is defined by four curves, the four curves are sequentially connected and bent in the direction far away from the center of the cable, the corresponding position of each curve is provided with a communication conductive wire, a reinforcing rope is arranged in a hole space formed by every two adjacent communication conductive wires, the buffering space, the communication conductive wires and the reinforcing ropes are integrated because space among the buffering space, the communication conductive wires and the reinforcing ropes is filled with flexible materials, the peripheries of the flexible materials are sequentially provided with a shielding layer, an insulating layer, a water-proof layer and a protecting sheath, and three electric lines serving as a live line, a zero line and a ground line are arranged inside the insulating layer; the communication conductive wires are symmetrically distributed with respect to the central axis of the cable, and the included angle between the connection line of one communication conductive wire and the geometric center of the cable and the connection line of another adjacent communication conductive wire and the geometric center of the cable is 90 degrees on any cross section of the cable. The extrusion-resistant composite cable is compact in structure and high in extrusion-resistant ability.