The utility model discloses a novel coal conveying belt cleaning device which comprises a belt conveyor, an upper carrier roller, a lower carrier roller, an upper carrier roller hanging bracket, an upper carrier roller support, a lower carrier roller hanging bracket, a fixing frame, a lead screw, a compression spring and an upper supporting plate. According to the utility model, the running direction of the belt is not required, the belt is not required to be driven by a motor, the energy-saving and consumption-reducing effects are achieved, and the electric shock danger does not exist; the comb-shaped steel wire carrier roller improves the cleaning capacity and the abrasion resistance, and frozen coal and frozen ash on the surface of the belt can be removed together; when large foreign matters exist on the surface of the belt, the belt is not damaged; the height of the upper supporting plate can be adjusted by adjusting the relative positions of the two upper pressing nuts and the lead screw, and then the tightening force of the compression spring is adjusted. The lower supporting plate can ensure that the lead screw is always kept vertical and does not incline; slideways on the limiting rods can limit the two upper carrier roller hanging brackets to synchronously move up and down; the device is firm in structure, not easy to damage, durable and less in maintenance time.