This multi-lay seed grader use two vibrating screen boxes placed in parallel, which can effectively grade and screen seeds, save space and increase yield. Its main application fields include agricultural seed production and processing, and can be used for grading and screening of wheat, corn, soybean and other seeds. Product features include high efficiency and energy saving, small footprint, easy operation, large output, etc. It can improve the quality and production efficiency of seeds and provide strong support for agricultural production.