Wire feeder adopts frequency conversion stepless speed regulation, electric machine direct drive and electronic counting, digital display ,and PLC control. It owns speed and length setting device, electromechanical separation and aerodynamic compaction organization. Therefore, the double current can feed different wires at different speed, length, and time, and either current can be chosen to feed separately as well. It is characterized by full function, accurate count, small size, steady drive, secure and reliable function, and other merits ,so it is an ideal feeder device.