Abstract: In the course of restoration of the secondary broad-leaved forest, the gaps which existing in the forest with different areas had been reformed by the gap technique and had yielded good results.It not only made the aim species growing up well in the gaps and promoted the growth of broad-leaved trees which surrounding the gaps, but also changed herbs in many respects such as species, density and cover degree.
In this paper, we reseach on herbs which in gaps and under the broad-leaved trees.The results showed that light is a key factor to the herb's growth and distribution.It is of great immediate significance that the gaps will promote the herb's growth and enhance the species diversity.

Key words: Gap, Herb, Diversity