Superfine Grinding Mill is made up of host, reducer, analyzer, maintenance platform, fan, bypass powder collector and electric cabinet. Besides, there is jaw crusher, bucket elevator, electromagnetic vibration feeder and hopper in the grinding plant. The materials satisfied requirements are crushed by jaw crusher and sent to the hopper by elevator. Then the vibrating feeder send materials to the grinding chamber for milling and the powder rising along with airflow in the fan is sent to analyzer for classifying. The powder satisfied demand enter powder collector and that discharged by valve is final product. The upper return duct of bypass powder collector absorb airflow into centrifugal induced draft fan, which confirms negative pressure closed cycle air flow system. And it is effective for the production field to keep clean.