Abstract: Based on EDEM software，process of disturbing population with slotted seed plate was simulated and analyzed with taking self-cleaning metering device as research object.Average normal force of population，average distance between population and seed plate and average velocity of population movement were investigated.Effects of slotted seed plate and non-slotted seed plate on population dispersion were analyzed and compared.Simulation results showed that slotted seed plate could effectively enhance dispersity of the population，reduce friction force in the population before seeds were absorbed by suction holes，and improve adsorption rate.Meanwhile，conclusion of simulation analysis was verified by bench test.By setting slots on seed plate，disturbance of the population could be strengthened.To a certain extent，it could improve ability of suction hole to absorb seeds and reduce leakage rate，miss index of seed meter could meet the national standard.