Novel electrode promotes device includes sharp advancing mechanism and sets up the electrode bar fixing device on sharp advancing mechanism, and is equipped with the insulating layer between electrode bar fixing device and the sharp advancing mechanism. The straight line advancing mechanism comprise slide mechanism and actuating mechanism, and slide mechanism includes slide rail, slider, gear and rack, and the slider slides and sets up on the slide rail, and slider and rack fixed connection, rack and gear engagement, and the gear is driven by actuating mechanism, and the electrode bar fixing device locate on the slider.