The sand and gravel processing production line includes jaw/impact crusher, heavy-duty belt conveyor, large-capacity square vibrating screen, bucket vertical elevator and large-capacity storage silo. The system has the characteristics of large processing capacity, precise grading, high automation, energy saving and environmental protection. It can realize fine screening of raw materials from 2 mesh to 150 mesh, with a processing capacity of up to 30 tons/hour, which is perfectly adapted to the fine grading needs of the sand and gravel industry.