【Objective】This research aims to explore the feasibility of utilizing terrestrial laser scanning (TLS) technology for acquiring stem form characteristics of trees and to evaluate and select elit of Korean pine (Pinus koraiensis), providing a theoretical basis for the comprehensive evaluation of superior provenances.【Method】Using 26 P. koraiensis provenances from the provenance test forest in Maoershan, Heilongjiang Province, as experimental materials, TLS was employed to scan sample plots. Data preprocessing was conducted using LiDAR360 software, and parameters such as tree height, diameter at breast height (DBH), and diameters at different heights extracted by TLS were evaluated. Four stem form parameters (breast-height form factor, breast-height form quotient, experimental form factor, and height-to-diameter ratio) were calculated. Additionally, taper equations based on provenance effects were constructed using diameters at different heights extracted by TLS to describe stem form variations among different provenances.【Result】TLS achieved high accuracy in extracting individual tree parameters. The extraction accuracy for DBH (coefficient of determination R²= 0.979 6) was superior to that for tree height (R²=0.811 4) and volume (R²=0.911 9). As the stem height increased, the R² for diameters at relative heights gradually increased, reaching its peak at 0.08h(R²=0.984 0, where h represents tree height). Beyond 0.08h, the R² for diameters at relative heights gradually decreased. Variance analysis of stem form indicators for the 26 P. koraiensis provenances showed that all indicators exhibited significant differences among provenances (P<0.05). Introducing provenance variables into the base model improved the fitting accuracy, and constructing a nonlinear mixed model with replication as a random effect further enhanced model precision. By plotting stem form graphs for different provenances, it was observed that the trends in stem form variation were generally consistent across provenances, but growth rates differed.【Conclusion】TLS demonstrated high accuracy in extracting individual tree parameters. All stem form indicators showed significant differences among provenances, indicating good potential for selection. Based on stem form indicators and the optimal taper equation incorporating provenance effects, a group of superior provenances was identified, providing a foundation for genetic improvement and widespread utilization of P. koraiensis.