Abstract: Forest gap interference is one of the important factors maintaining forest ecosystems. It also plays an important role in driving seedling natural renewal process, forest species composition and forest biodiversity. In this study, the size structure, seedling regeneration, growth of forest gap on Schima superba in Jianglang Mountain of Zhejiang Province after 2008 snowstorm interference were evaluated, the results showed that the quantity of 50~100 m2 forest gaps in expanded gaps was the most (accounted for 45.45% of the total), which also occupied the highest percentage in area (accounted for 30.31% of the total area). The mean seedling height and basal diameter of forest gap were 1.44 cm and 0.66 mm higher than that of the control, while the average tree height and basal saplings were 45.37 cm and 5.00 mm higher than that of the control. The effect of forest gap size on seedling, saplings height and basal diameter was significant. The seedling height and basal diameter in medium size forest gap were significantly higher than that in small and maximum forest gaps (F=4.893, P=0.007, F=5.203, P=0.004; n=357). The difference of the basal diameter in different size forest gaps was significant (F=3.569, P=0.037; n=43). The forest gaps' seedlings regeneration density increased with the area of forest gaps, which reached its maximum value when the forest gap area was 76 m2, then the density decreased rapidly with the area of forest gap. Most regenerated seedlings in medium and small area forest gaps was low plants (grade 1 and 2), the S. superba seedling grew faster when the forest gaps area larger than 100 m2. Compared with other studies on natural forest gaps, the structure and size distribution of forest gaps changed after snowstorm interfere, the percentage of forest gaps with the area of 50 100 m2 was higher, which was more conducive to seedling regeneration and relatively large seedling regeneration density at some extents. No matter the size of the forest gaps, the quantity of seedlings in forest gaps was more than that within forest, the forest with larger canopy density or on a large area of open space is not conducive to the growth of regenerated seedlings. Therefore, based on the structure of forest gaps, seedling regeneration and seedling growth, the forest gap with medium area is suitable for the regeneration of seedlings.