Raw coal is screened through the lattice screen from the raw coal stockpile and then falls onto the belt conveyor or elevator with large inclination angle, and after iron removal by electromagnetic iron remover, the belt conveyor or elevator sends the raw coal into the raw coal silo for storage. After the pulverizing system has been started, open the bar valve at the bottom of the raw coal bin, start the sealed metering tape coal feeder, and the raw coal enters the vertical coal mill for drying and pulverizing. The hot air or exhaust gas from the hot air furnace, under the extraction of the system fan, enters into the vertical coal mill, and the raw coal to be milled in the mill for full heat exchange, and then bring up the coal dust in the separator for separation, the fineness of the unqualified coarse coal dust to fall back to the mill for milling, the qualified coal dust with the airflow into the explosion-proof air box pulse dust collector to be collected, and then unloaded into the pulverized coal warehouse through the compartment wheel. The debris in the raw coal, such as part of the gangue, metal pieces, etc., are excluded from the mill through the wind ring and slag spit. In the whole process, CO-O2 online analysis system is set up, and when processing coal with high volatile matter, protective measures such as nitrogen protection and CO2 automatic fire extinguishing system can be set up.