The study was carried out on 2 plots with different fallow period in the core. zope area of Cao Vit gibbon Protected Area. Results have shown that the composition of tree and seedlings in the research area are simple and low density. Regenerations are most from the seed with good quality than regeneration from shoot. Almost regenerated seedling are light-demand and fast growing species, however, are not or low economic value. The soil analysis showed that soil nutrient content in this area is good fertility, Perfectly suited for the growth and regeneration of forests in this region. However, the actual coverage of over 80 percent vegetation is mainly grass, feather grass, reeds, vines, fmperata grass and shrubs... prevented the regeneration capacity h'ere and this really is regarded as the main factor leading to weak regeneration and not recovered.