After crushing, qualified materials are uniformly and quantitatively fed into the main grinding chamber via a variable frequency belt feeder for grinding. The ground material is then sent by airflow from a blower to a classifier for grading. Under the action of the classifier, materials that do not meet the fineness requirements fall back into the grinding chamber for regrinding, while qualified materials are carried by the airflow through a pipeline into a cyclone dust collector for separation and collection. The collected material is then discharged as the finished powder via a discharge device. The separated airflow returns to the blower through the return air duct at the top of the cyclone dust collector. The system operates under positive and negative pressure conditions and is equipped with a pulse dust collector, meeting national environmental protection standards.