The invention discloses a cable which comprises a conductive core, an insulating layer (5), shielding layers and a protecting layer (7). The shielding layers are respectively arranged in and out of the insulating layer. The conductive core comprises a conductive inner core (1), fins (2) which are radially arranged along the conductive inner core (1), and a heat radiating layer (3) which is filled among the fins (2). The heat radiating layer (3) is a low-melting-point alloy layer. The cable has advantages of high current carrying capability, high heat radiation capability, remarkable energy saving effect, low aging speed, and effective capability of prolonging service life of the cable.