The invention discloses a crushing device for
coal mining. The device comprises a sliding rail, a sliding groove, a supporting plate, a fixed bolt, a rotating shaft, a first rotating cylinder, a firstbevel gear, a first
electric motor, a placing trough, a second
bevel gear, a sliding frame, a fixed shaft, second rotating cylinder, a
linear motor, a fixed block, a fixed column, a roller, a rotating column, a connecting block, a connecting rod, a fixed rod, an electric push rod, a pressure plate, a fixed shell, a second
electric motor, a knife seat, a
coal mining knife, a fixed seat, a fixed bar, a baffle, a
conveyor belt and a third
electric motor. The crushing device for
coal mining is simple in structure and novel in design, is convenient for workers to adjust the placing position of thedevice, and at the same time, is convenient to stably fix the adjusted device so as to ensure stable mining of the
coal mining knife, and is convenient for the position adjustment of the coal miningknife so as to improve the using range of the device, and is convenient for the
linear motor to stably push a sliding frame to move stably so as to make the using convenient.