High correlation among DBH, the height and crown growth parameter of Chamaecyparis taiwanensis were found in the young natural stands located in Chi-Lan-Shan area. Osumi's Polynominal model was used in this study to describe stem taper curve of various crown class. The crown structure of this species was approximately conic shape, and the longest and/or the largest branches mostly appeared at 1/3-1/4 of the tree height. The stem-fork of main stem was rarely found on these naturally regenerated stands; it occurred only on 7% of the total tress observed. In most cases, the branching occurred at the height of 0-1m.