The invention relates to a dry-mist dust suppression system of a tippler. The dry-mist dust suppression system comprises a pressure pump, an air compressor, an air storage tank, a mist dryer, and a mist spraying tank. The pressure pump is connected with the mist dryer through a waterway pipeline, and the air compressor, the air storage tank, the mist dryer, and the mist spraying tank are sequentially connected through an air pipeline. The dry-mist dust suppression system is characterized in that an electric control system and a flow control system are arranged in the mist dryer, wherein the electric control system comprises a programmable controller, a protection circuit, and a relay and has two mode of manual and automatic operation. The mist dryer is provided with a man-machine interface touch screen. The mist spraying tank also comprises a fixing clamp and an angle-adjustable fixing seat. The mist spraying tank is disposed in the fixing clamp, and the fixing clamp is mounted on the angle-adjustable fixing seat. The dry-mist suppression system has the advantages that the dry-mist dust suppression system of the tippler sprays mist in smaller diameter and is more uniform in atomization as compared with a conventional water spraying and dedusting system, and water consumption is greatly reduced.