tiếng anh The researches on the situations of broad leaf natural evergreen forest in Kon Turn province show: Forest composition of high tree class including the dominant tree species, which are: Lagerstoemia speciosa (L.) Pers., Schima superbaGard and Champ, Syzygium wightianum Wight, Leocaena leococephana (Lam.) de Wit, Lithocarpus sp, Knema confera Warbg. The distributions of some tree species following the diameter (N/D) and the height of the tree (N/H) are suitable with the distribution function/fomular in Weibull theory. From researching on the actual N/D structure of the forest status IV A, IVB, IIIA2, IIIB in Kon Tum province, this research proposes the levels of impact to each kind of forest and different using purposes: With protection forest, basically, there is no impact except the slight impact of the present regulations on the management of protection forest. With large scale production forest and community production forest, it is necessary to cut a particular number of trees at different diameter sizes based on the forest status and each the type of forest. The result of researching on the forest regeneration shows the main restoration trees are: Knema confera Warbg, Schima superba Gard and Champ, Lithocarpus sp, Syzygiwn wightianum Wight ...basically, these kind of tree species are suitable with the structure of high tree class. However, the prospects of regeneration density and the density of restoring trees are not high although the quality of restoring trees is quite good. There are some factors considerably/markedly influence on the regeneration of forest, which are the coverage of canopy, the fresh of tree at bush class, terrain and the human factor.