The invention discloses a rear view mirror capable of being automatically cleaned. The rear view mirror capable of being automatically cleaned comprises a rear view mirror housing, a mirror body is arranged at the surface of the rear view mirror housing, a dust brush rotary shaft is fixedly arranged at the bottom end of the mirror body, a dust brush driving box is arranged at the bottom end of the rear view mirror housing, a driving motor is arranged inside the dust brush driving box, a reducer is arranged at one end of the driving motor, a reducer worm is arranged at one end of the reducer, the reducer worm is meshed with a reducer worm gear at the top of the reducer worm, the reducer worm gear is fixedly connected with one end of a driving rod assembly, the dust brush rotary shaft is fixedly connected with one end of a dust brush arm, the other end of the dust brush arm is fixedly connected with a dust brush sheet, the rear view mirror housing is provided with an annular linking rod, a dust detector is arranged in the center of the annular linking rod, a light ray receiving plate is arranged at the surface of the dust detector, and a light emitting opening is formed in the top of the light receiving plate. The rear view mirror capable of being automatically cleaned is provided with a device capable of automatically wiping the mirror body, manpower is saved, so that the rear view mirror is cleaner and brighter, and vehicle driving is safer.