Abstract: Seedling characteristics are the first link in yield formation on super rice varieties. In order to investigate their seedling characteristic, four super rice varieties has been studied in the year 2010 and 2011, so does the position order of factors which effect dry matter accumulation. The results showed that in the middle season of 2010, there had significant or very significant difference between height of seedling, leaf sheath width, number of stems per plant and leaf age, while in the last season of 2011 there had no significant difference between all materials. In middle season, plant with elder leaf age, wider leaf sheath width, moderate height of seedling and number of stems per plant should be selected, while in late season, plant with higher height of seedling, wider leaf sheath width, moderate leaf age and number of stems per plant should be selected. Preliminary study showed that breeding indexes in the middle season was leaf age 4.67-5.07, leaf sheath width was 6.70-6.82 mm, plant height was 33.53-35.13 cm, number of stems per plant was 1.1-1.8, as in the last season plant height was 43.90-48.06 cm, leaf sheath width was 6.3-7.3 mm, leaf age was 7.76-8.10, number of stems per plant was 1.6-2.0.