Focusing on the existing problems of precision seeder the plate type plug seeder based on magnetic attraction was designed. The seeder can complete the process of attracting seeds and planting using magnetic attracting principle. Through prototype test of tobacco seeds the following conclusions can be obtained: in the attracting position the single seed rate comes up to 90% and in the seeding position the planting rate is 100%.This design combines seed pelletization technology and mechanization sowing technique. It can work entirely by manual operation. It has higher planting precision and good adaptability of the seeds. So it is suitable for large-scale factory breeding.