Mine screening machine

The utility model discloses a mine screening machine which comprises a supporting frame, a damping base fixed to the upper portion of the supporting frame, an obliquely-arranged screening box and a collecting hopper located at a discharging port of the screening box, the discharging port of the screening box extends into an inlet of the collecting hopper, a funnel-shaped collecting space is formed in the collecting hopper, and the outlet of the collecting hopper is smaller than the inlet. A dust collecting mechanism and a buffering mechanism located at the outlet are arranged in the collecting hopper, and the buffering mechanism plays a role in buffering falling of ore materials; the dust collection mechanism comprises a negative pressure box, a negative pressure fan and a dust collection plate for separating the negative pressure box from the material collection space, a plurality of dust collection holes are formed in the dust collection plate, the negative pressure fan absorbs flying dust generated when th