Abstract: The technique of plate breeding and throwing seedlings for hybrid rice is researched.Our experiment shows that hybrid rice plate breeding and throwing seedlings cultivation can enhance the quality of seedlings.It shows also that biological character is better and the yield is the highest when the density of throwing seedlings is 600 plate/hm~2.Comparing with traditional breeding seedlings,the yield can increase by 11.35% over the traditional one.The average yield of six years of "Shanyou 63"reached to 7 499...