The invention provides a new-energy automobile defogging device. The new-energy automobile defogging device comprises two guide rails mounted at the top and the bottom of an automobile windshield; an electric heating bar is mounted between the two guide rails; a driving motor is mounted inside one end of the electric heating bar, and the output shaft of the driving motor is connected with rotary wheels matched with the guide rails. The new-energy automobile defogging device has the advantages of being simple in structure and good in defogging effects.