Abstract: After a lot of plots were established in 1986 and 1987, they were remeasured about every two years, so we used remeasured data 4-14 times. According to these data, volume, density, tree species composition, diameter class, q value, etc. were analyzed. Therefore,structure optimization in sustainable forest management of natural forest was concluded. Then we put forward some suggestions in the management which is leading to the optimal stand structure. It is worth of pointing out that this research is couducive to the target of natural forest management in Changbai Mountains, and has practical significance.

Key words: natural forest, overcutting forest, sustainable forest management, structure optimization