The utility model provides a track traffic power-supply contact rail cable connection plate device, comprising a connection plate I and a connection plate II which are fixed and connected with two sides of the contact rail by a connection bolt, wherein the connection plate II is arranged at the outer side of the contact rail, a cable connection plate extending towards the outer side of the contact rail is arranged on the connection plate II and a cable connection hole is produced at the outer end of the cable connection plate. The connection plates and the cable connection plate are integrally compacted by extrusion and the cable connection plate extends to the outer side of the circuit to make the power-supply cable kept in a certain distance with a vehicle collector shoe, the current carrying and conduction quality is increased, the safety hidden trouble is eliminated and the traveling safety is ensured.