Abstract:In order to avoid wheat sowing instability caused by the land wheel skid, the study puts aside the purely mechanical seeding mode which is driven by traditional wheel. It uses a self-designed and developed double suction seed plate, a semi-open seed container, CVT governor, corresponding accessories of sowing machine and so on. The perfect combination of CVT technology and feedback control technology is applied to the wheat double precision seeder. In this technique, the force of seed shaft is from the power output of the tractor tail. It uses wireless transfer mode of SCM to establish a set of control algorithm between forward speed, wheat sowing quantity and sowing spacing. The seeding shaft speed tracks the forward speed in order to ensure the constant distance when trans-miss the progress status. Prototype tests indicate that the wheat double precision seeder developed by air suction stepless regulation can reach precisely the expected target about the fall for each particle. Meanwhile, it has steady performance, small errors and spacing constant.