Abstract: With a comprehensive review of the plot-sowing mechanization development in China, this paper presents detailed discussion and analysis of research and development of seed metering devices, i.e. the key component of seeders, and precise-control technology of plot seeders. The working process of 2BY-6 plot-sowing machine designed by Qingdao Agricultural University was described, which exhibited technological innovations in flexible seed metering, electricity control drive, and automatic seeding. Suggestions are made in this paper that plot-sowing mechanization in China should be developed on the study of the fundamental theory, auto-control, and multifunction machines, and more collaborations with advanced companies abroad, providing a reference for plot-sowing machine research in China.