Abstract: The breeding experimental plot is an important means and method for the comparison of improved varieties and different varieties.With the improvement and application of the breeding planter technology,it has become one of the important guarantees for seed breeding.In order to solve the problem of the existing seed-clearing difficulty of the existing soybean seeding seed metering device, an electronic control-based automatic seed-clearing wheel type soybean seeder was researched and designed.The seeder uses two stepper motors to jointly control the seeding and seed-clearing, and uses the pulse equivalent of the pulse generator to control the rotation speed of the seeding shaft and the opening and closing angle of the seed-clearing plate, thereby achieving single seeding and breeding during the breeding process and quick seed-clearing.The performance test was carried out on the seed meter test bench.The results showed that the seeder realized sowing and seed-clearing functions, the missing-seeding rate and the reseeding rate were less than 0.10% and 1.22%,the variation coefficient of plant spacing was less than 2.98%, and the seed-clearing rate was more than 99.10%.The minimum seeding time was 4.39 s.The planter had good performance and was consistent with the sowing of soybeans in the plot precise seeder, agronomic requirements.