Mine excavation working face dust falling device

The utility model relates to the technical field of mine excavation auxiliary equipment, and discloses a mine excavation working face dust falling device which comprises an installation frame, a powerbox and a dust suction machine. The lower side output end of the dust collector communicates with an air pipe extending to the left side and the right side in the mounting frame, a dust filtering netused for filtering dust is arranged at the joint of the lower side of the dust collector and the top of the air pipe, and the left end and the right end of the air pipe symmetrically communicate withtelescopic pipes distributed in the left side and the right side of the mounting frame; the bottom end of the telescopic pipe communicates with a sleeve arranged inside and outside the mounting framethrough a communication valve, a set of fan-shaped dust suction plates are vertically connected into the sleeve in a sliding mode, the bottoms of the fan-shaped dust suction plates are rotationally connected with two sets of pl