The invention relates to a raw coal system based on multiplex heat exchange. The raw coal system is characterized by comprising a trolley, a middle coal storage bunker, a first conveyer belt, a double-roll crusher, a second conveyer belt and a raw coal drying device, wherein the trolley delivers water spray cooled raw coal into the middle coal storage bunker; then, the first conveyer belt transmits the raw coal to the double-roll crusher for crushing; and after being screened, the raw coal is transmitted by the second conveyer belt to the raw coal drying device for drying.