Abstract: This study was directed towards insufficient seeding, low tillering rate and utilization rate of fertilizer. The results were showed as follows. When seedling-throwing density was kept within the range of 180000-315000 hole/hm2, grain weight of ratooning rice remains the same. Tiller number and number of productive ear reach maximum with 20.3-24.3Seeding/Hole and 18.9-20.1 spike /hole if seedling-throwing density was kept within the range of 180000-225000 hole/hm2. If excessive bud-promoting fertilizer was applied, the length of regeneration bud increased. However, seedling number, number of productive ear, setting percentage and Microcomputer nest spike weight decreased, which resulted in low yield of hybrid medium rice. In the meantime, chemical promoter 4PU-30、Yield precise, humic acid and IAA can promote single spike weight and growth of regeneration bud, which resulted in high spike numbers and high yield.