Abstract: Masson pine (Pinus Massoniana Lamb.) in Guizhou Province, according to its distribution, is divided into two categories to design rationally the modeling sample structure. One is the central area and the other is the general area. For the research we collected respective data on felled wood for different modeling modules, fit Binary Tree Volume Yamamoto-type basic model and the variable parameter model, analyzed the statistical indexes and tested the adaptivity of the models,and finally concluded the Yamamoto variable parameter model is the best model which can be used successfully in the modeling unit.

Key words: Masson pine, two-element tree volume, variable parameter model