Striking deashing device

The invention discloses a striking deashing device. An annular frame is provided with an accommodating space and an annular outer edge. When an air cylinder drives the annular frame to move forwards, a disc-shaped brush is positioned inside the accommodating space, and the annular outer edge strikes on the outer wall of a to-be-deashed pipeline, so that bonding strength of accumulated dust and the outer wall of the to-be-deashed pipeline is lowered; when the air cylinder drives the annular frame to move backwards, the disc-shaped brush is exposed on the outer side of the accommodating space, and when a motor drives the annular frame to rotate, the disc-shaped brush rotates, so that the accumulated dust is removed from the surface of the to-be-deashed pipeline. The striking deashing device is suitable for the condition that the accumulated dust is tightly bonded with the outer wall of the to-be-deashed pipeline.