Track traffic middling pressure power cable

The utility model discloses a track traffic middling pressure power cable, comprising a conductor located in the center of the cable, a comprehensive sheath layer composed of a conductor shielding layer, an insulation layer, an insulation shielding layer, a semiconduction grid layer, a metal wire shielding layer, a metal tape shielding layer, a longitudinal covered metal belt layer and an extruding inner sheath sleeve which are sequentially arranged outside the conductor, a metal wire armor layer, a metal tape winding cladding layer, a grid layer and a sheath layer. The cable with the structure possesses the characteristics of a super system short circuit current bearing capacity, an excellent electrical performance, a stable transmission performance, a superior waterproof performance, an water tree resistant insulation performance, a rat and ant resistance performance and a comprehensive environmental protection performance of non halogen, low smoke and flame retardation, and can be used as power transmission wires to be widely applied for single phase alternating current traction power supply systems of track traffic and electrification railways.