Multiple composite global function all-functional micro mist crushing and grading machine unit

The utility model relates to a multi-combination multi-functional micro-powder crushing and grading machine and belongs to the technological field of pharmaceutical equipment. The machine comprises a crushing device, a grading device and a collecting device. The crushing device and the grading device are separated as a crusher and a grader. The feeding opening of the crushing chamber of the crusher is connected with a feeder. The discharging opening of the crushing chamber is communicated with the inlet of the grading chamber of the grader through a powder conveying catheter; the outlet of the grading chamber is connected with the inlet of the collecting equipment through an internal channel. Because of the relative separation between the crushing chamber and the grading chamber, the material to be crushed can not be kept for a long time as a result of the blockage of the grading mechanism, thus avoiding the ''over crushing'' phenomenon and improving the crushing capacity.