The raw materials are evenly and continuously fed into the main grinding chamber for grinding by the variable frequency belt feeder. The ground materials are sent to the powder selector by the fan airflow for classification. Under the action of the analyzer, the materials that do not meet the fineness requirements fall into the grinding chamber for re-grinding, and the qualified materials follow the airflow through the pipeline into the cyclone powder collector for separation and collection, and are discharged through the discharge device as the finished powder. The separated airflow enters the fan through the return air duct at the upper end of the cyclone powder collector. The production system operates under negative pressure and closed conditions, and is equipped with a pulse dust collector without dust spillage, which meets national environmental protection standards.