Pulverizer dust removal device

The utility model provides a dust removal device of a crusher. The device comprises a cyclone dust collector, a closed-air aspirator and an induced draft fan, the air inlet of the cyclone dust collector is connected with an air pipe connected with a crusher; the airlock is connected with the lower part of the cyclone dust collector; the induced draft fan is mounted at the top of the cyclone dust collector; an outlet of the induced draft fan is connected with a dedusting cloth bag; the pulverizer dust removal device further comprises a filter ring mechanism used for being installed in the lowerbox body. The filter ring mechanism comprises a mounting frame driven by a speed reducing motor to rotate in the horizontal plane and an annular sheet-shaped filter body detachably mounted on the mounting frame, the upper surface of the filter body is attached to the inlet of the air pipe and completely covers the inlet of the air pipe, and the filter body is of a porous structure so as to filterdust in airflow passing t