Dust-free ore crusher

The utility model provides a dust-free ore crusher which comprises a crushing box, a driving assembly and a collecting vehicle, according to the dust-free ore crusher provided by the utility model, dust-free ore is put into a supporting cylinder, and then limiting on an extrusion plate is canceled through a first threaded column, so that the extrusion plate is tightly attached to the upper part of the dust-free ore; then, a driving motor is started to drive a baffle not to shield a feeding port any more, the dust-free ore flows into the crushing box through the feeding port to be crushed, along with downward movement of the dust-free ore, an extrusion plate drives an extrusion disc to move downwards, and the bottom end of the extrusion disc extrudes a trigger switch; and the trigger switch starts the driving motor to drive the baffle to shield the feeding port, so that the dust-free ore is stopped from being discharged, then the dust-free ore can be quantitatively fed, and the problems that an existing crushe