Coal mine operation ventilation device

The invention belongs to the technical field of coal mining equipment, and particularly relates to a coal mine operation ventilation device. The coal mine operation ventilation device comprises a main body, a dust collecting box used for storing dust is arranged at the position, close to the front end, of the lower portion of the main body, a guide sleeve used for expanding a ventilation area is slidably connected to the outer side of the front end of a corrugated pipe, and a brush used for preventing the dust screen from being blocked is arranged at the front end of a dustproof net. The brush is arranged at the front end of the dustproof net and is fixed by using a fixing plate, a rotating shaft is driven by a motor to rotate to drive the brush to clean the surface of the dustproof net, so that dust particles are prevented from being adhered to the surface of the dustproof net to influence the subsequent ventilation effect; and a sliding plate is slidably connected to the inner side of a supporting frame so