Abstract: In order to avoid the adverse effects of wheel sliding on the seeding uniformity and ensure good sowing quality, a intelligent control system with stepping motor driving the seeder was designed. AT89C55 micro control unit (MCU) was used as control core, and the real-time seeding advancing speed was detected by the rotary encoder. Judged the speed and set the seeding space (or sowing rate) by microprocessor (CPU), this system regulated the stepping motor speed to drive the device to sow as needed. In addition, this system realized some auxiliary functions, such as liquid crystal display (LCD) and acousto optical alarm. The results showed that the system was stable and reliable, and could meet the seeding requirements.