Abstract: Aiming at problems such as ground wheel slip and inaccurate manual sowing amount adjustment, a wheat intelligent seeder based on PID control was developed．When control system of seeder was working, speed of seeder was obtained by speed sensor．Based on travel speed, unit area sowing amount, and relevant parameters of seeder, given value of seeding wheel speed was calculated, and a PID controller was used to control seeding wheel speed．Experimental results showed that, error between actual sowing amount per unit area and set sowing amount per unit area was less than 2% under different working conditions, which met agronomic requirements of precision sowing of wheat．Intelligent seeding system has the highest control accuracy and good stability under medium and high speed operation conditions．Results of field test showed that, the maximum error between actual sowing amount per unit area and set sowing amount per unit area of wheat planter was 2.33%, which was slightly larger than indoor test result, mainly caused by field working environment and other factors．Intelligent wheat seeder based on PID control can improve sowing precision effectively．