Abstract: Aiming at research and development of millet precision seeding and fertilizing machine，five key parts were designed.Firstly，coaxial transmission used gears instead of chains to change speed.Speed changing structure between ground wheel drive and seeding device was simplified.Chain breaking and falling was avoided.Secondly，connecting frame was respectively installed with connecting seats，so that position of earth covering rod could be adjusted and covering soil could be accurately controlled.Thirdly，an open clapboard plate was set between scooping tray and storage tray，which could control amount of seed taken by tray step by step.Fourthly，ground wheel had set up covering hole to make soil fall into seed hole through covering hole，so as to ensure that amount of soil in each hole was the same.Fifthly，sowing plate could adjust chain drive tightness，accurately adjust sowing amount，save seeds and reduce cost.This machine solved problem that farmers needed more labor force to thinning seedlings in process of millet production，and realized maximum effect of millet free thinning and high yield and cost saving in key production links.