The invention provides a drilling anti-dust device which is of a columnar structure; a through hole used for inserting a drill rod is arranged in the axis direction of the drilling anti-dust device; the end of the drilling anti-dust device is provided with a water inlet which is connected with an external water supply; and a plurality of spray orifices are arranged in the inner wall and the outer wall of the drilling anti-dust device, and all the spray orifices are communicated with the water inlet. According to the invention, the drilling anti-dust device is configured to be of the columnar structure, the through hole used for inserting the drill rod is arranged in the axis direction, the end of the drilling anti-dust device is provided with the water inlet which is connected with the external water supply, the plurality of spray orifices are arranged in the inner wall and the outer wall of the drilling anti-dust device, and all the spray orifices are communicated with the water inlet. By using the plurality of grouped spray orifices, the spraying dust-removing is conducted in a rock wall before coal or rock dust particles enter a roadway, so that dust is reduced conveniently by an operator in the drilling process, and dust hazards to the operator are reduced.