Terrestrial Laser Scanning（ TLS） has shown great potential in obtaining the structural parameters of individual trees in past decades. In this work

three-dimensional point cloud data generated from TLS were obtained for a homogeneous forest plot with20 Pinus bungeana（ Pinus bungeana Zucc） trees. Through the analysis of the vertical profile of the point cloud data of an individual tree

a voxel-based method was developed to estimate crown base height. Further

the tree crowns were delineated by calculating the convex hull of each horizontal sliced point cloud data at different heights. In addition

crown volume

crown width

tree height

and Diameter at Breast Height（ DBH） were estimated at the same time. The TLS-based estimation captured 97% variation of the manually measured clear bole height（ n = 20

Root Mean Square Error（ RMSE） = 0. 21 m

p = 0. 01）. The R2and RMSE of DBH provided the coefficient of R2was 0. 79 and 1. 07 cm（ n = 20）

respectively. Crown length

DBH

and crown width were selected to predict crown volume by the stepwise linear regression method

and statistical analysis showed that the linear regression m odel explained 96. 7% of the crown volume variance with an RMSE of 2. 64 m3（ n = 20

p = 0. 01）. The method developed in this i nvestigation accurately estimated crown base height and crown geometry and can thus facilitate the application of TLS in precision forestry.