Copper sliding wire is developed by integrating the advantages of unipolar sliding wire and steel body. The conductor is made of T3 electrical copper hot-extruded and cold-drawn. It has good electrical conductivity, small voltage drop and high strength. The outer shell (insulation sheath) of the copper body slide wire is extruded by flame-retardant engineering plastics, and its wall thickness (3 mm) has the advantages of high temperature resistance and strong insulation. Suspension frame adopts iron suspension frame, which has double protection with sliding wire insulation, has high strength and good reliability, especially in high temperature environment. The conductive surface of the copper conductor is R-shaped, and the contact area with the collector is enlarged, and it is not limited by the angle of the collector when in contact, and can always maintain a good contact surface.