Copper-magnesium twisted wire is mainly used to make the carrier cables and supporting wires in the contact networks of electric railway. Electrification of the railway transport for copper-magnesium alloy wire (catenary), particularly suitable for the heavy electric railway transportation, as copper alloy magnesium alloy wire to strengthen and reinforce the role of processing, mechanical strength, corrosion resistance , thermal stability, overload and other high performance composite materials, fully able to meet the needs of high-speed electrified railway operation.