Large stone materials from the hopper are evenly and continuously fed into jaw crusher through vibrating feeder for primary crushing; the crushed materials are transported to cone crusher or impact crusher for fine crushing through belt conveyor; then the materials are transported to vibrating screen to be separated into different sizes. The end products with desired sizes will be transported to the final product pile and those with big sizes will return to the cone crusher or impact crusher for re-crushing. This forms closed and continuously automatic cycles. The plant can be equipped with dust removing facilities to protect environment according to customers' requests.