The invention discloses a graphite electric brush and a preparation method thereof. The graphite electric brush comprises a bottom frame, wherein a supporting column is fixedly arranged at the centerof the top end of the bottom frame; a supporting rod is fixedly arranged at the center of the top end of the supporting column; a steering ring is mounted at the periphery of the supporting rod in a rotary match manner; storage boxes are symmetrically and fixedly arranged at left and right sides of the steering ring; a limiting device is arranged between the bottom end of the steering ring and thetop end of the supporting column; an undercarriage is fixedly arranged at the top end of the supporting rod; an arc-shaped groove is formed in a bottom end face of the undercarriage; a tooth-shaped ring stretching into the arc-shaped groove is fixedly arranged on a top end face of the steering ring; a first transferring cavity is communicated with a top wall at the left side of the arc-shaped groove; a first gear is mounted in the first transferring cavity in the rotary match manner; the first gear and the tooth-shaped ring are mutually engaged; a second transferring cavity is formed in the right side of the first transferring cavity in an upward stretching manner; a first steering shaft is mounted at the lower side of the second transferring cavity in the rotary match manner.