The invention discloses a
metal dust collecting device for
machining. The device comprises a movable supporting box, a dust collecting cover, a telescopic dust collection
pipe, a negative pressure dust collection apparatus, a
cyclone dust collector, a dust collecting bin, a liquid filtering apparatus and a magnetic mud cleaning apparatus, the movable supporting box is arranged to be a hollow cavity, the
cyclone dust collector penetrates through the upper wall of the movable supporting box and is arranged in the movable supporting box, an air inlet is formed in the side wall of the upper end ofthe
cyclone dust collector, the negative pressure dust collection apparatus is arranged on the upper wall of the movable supporting box, the telescopic dust collection
pipe is arranged at the input end of the negative pressure dust collection apparatus, the output end of the negative pressure dust collection apparatus is communicated with an air inlet of the cyclone dust collector, and the dust collecting cover is arranged at the end, away from the negative pressure dust collection apparatus, of the telescopic dust collection
pipe. The invention belongs to the technical field of mining equipment, and particularly provides a
metal dust collecting device which is high in practicability and safety, facilitates comprehensive collection of
metal dust in the air, and facilitates
machining in the cleaning apparatus.