根据人工林火炬松木材的晚材率、生长轮宽、管胞长度、微纤丝角及密度等材性指标的测试数据以及方差统计得出的材性变异规律，采用有序聚类最优分割法划分出火炬松的幼龄期为１５ａ、同时探讨了幼龄期与成熟期的材性及两者之间的相关性；根据幼龄材的构造特征和材性指标，运用回归分析方法，推导出成熟材的理论预测值，经误差分析，该值与实测值十分接近，表明回归分析可以有效地实现材质早期预测。 According to the test data of wood material such as latewood rate, growth wheel width, tracheid length, microfibril angle and density, as well as the variance of material variance obtained from variance statistics, The splitting method was used to divide the young period of loblolly pine into 15a, and discussed the material properties of young and mature period and the correlation between them. According to the structural characteristics and the material properties of juvenile timber, regression analysis , The theoretical predictive value of mature wood is deduced. By error analysis, the value is close to the measured value, which shows that regression analysis can effectively predict the material early.