Synchronous treatment method and system for stone grading and crushing

The invention provides a synchronous treatment method and system for stone grading and crushing, and relates to the field of stone treatment. The synchronous treatment method for stone grading and crushing comprises the steps that waste stone obtained after primary dry separation enters a vibrating screen to be screened, and the waste stone on the screen returns to be finely crushed through a belt to be crushed to form a closed circuit; a mineral recovery process is carried out on a belt from fine crushing to screening, and ores and waste rocks subjected to medium and fine crushing are sorted; ore enters an original processing system, waste rock enters a building stone processing system, and synchronous operation of ore supply, stone screening and ore recycling is achieved. And the ore dressing production cost can be reduced. The tailing magnetic mineral recovery operation is added while stone processing is carried out, the recovered magnetic mineral is returned to a separation plant for regrinding and resepa