Abstract: In compare of the two raising seedlings patterns: dry-raising seedlings in super high-yield cultivation practice and wet-raising seedlings in tradition one, this paper studied their performance of rice seedling quality, root and physiobiochemical characteristic, to search for the influence of the different raising seedlings patterns upon the rice yield, aiming to clarify the physiobiochemical reason of super high-yield under super high-yield cultivation practice. The study showed that the dry-raising seedlings of super high-yield cultivation had more dry matter accumulation and tillers，but lower height of plant than the wet-raising seedlings. It also indicated that in comparison with the wet-raising seedlings, the dry-raising seedlings had more developed root systems with the stronger abilities of deoxidization, and exhibited the higher activities of nitrate reductase(NR), ATPase, and cell protective enzymes such as catalase(CAT), peroxidase(POD), superoxide dismutase(SOD) and higher content of chlorophyll, but lower content of malondialdehyde(MDA), performing the stronger ability resistant to environmental stress, being advantageous to the formation of dry-raising seedlings.