Abstract: The experiment was conducted on Setaria sphacelata with different germination rate according to the seeding rate.Germination rate of 1%,2%,5%,10% and 15% were set up to observe the change laws of the seedling emergence rate,coverage,tiller number,height and dry matter yield of S.sphacelata in the first year.The results showed that S.sphacelata with different germination rate had significant difference in early planting stage.And the difference was less and less with the tiller growth of S.sphacelata and the difference was not significant after 3～4 months.