The utility model discloses a high jewelling of electric motor car or aluminum alloy pencil. The technical problem that solves is that the high -voltage line beam ratio of loud -break switch system is more, and the line footpath is thick, and weight is big, is influencing the continuation of the journey mileage of electric motor car. The utility model discloses a shielded cable, shielding inner ring, shielding outer loop, magnetic ring, plastic sheath, aluminum pipe and copper contact head, shielded cable include conductor inner core, the inner insulating layer, shielding layer, external insulation layer from inside to outside in proper order, the shielding inner ring cup joint the tip at shielded cable, the shielding outer loop cup joints on the shielding inner ring with the magnetic ring, the plastic sheath setting is in the outside of shielding outer loop and magnetic ring, after the aluminum pipe is connected with the conductor inner core and copper meet contact connection. Adopt behind the above -mentioned technical scheme the utility model discloses, can guarantee to reduce pencil weight under the high -voltage line bundle prerequisite safe in utilization.