本研究根据吉安地区不同立地条件的２６５块标准地内的大量解析木资料，以山本式Ｖｂ＝Ｃ０·ＤＣ１·Ｈｃ２模型为基本框架，分析了参数Ｃ１、Ｃ２与直径和树高之间的相关关系，建立了湿地松二元立木树皮材积及树皮率动态估侧模型。两个模型均能充分利用样本信息，具有稳定的参数，明显优于一元常规模型。经检验，完全适用于建模范围，可为生产实际提供科学依据。 In this study, based on a large amount of analytical wood data from 265 standard sites in different habitats in Ji’an, the correlation between parameters C1, C2 and tree height was analyzed based on the Yamamoto Vb = C0 · DC1 · Hc2 model , Established a dynamic estimation model of birchwood bark volume and bark rate of Pinus elliottii. Both models can take full advantage of the sample information and have stable parameters, which are obviously better than the one-dollar conventional model. After testing, fully applicable to the modeling range, can provide a scientific basis for the actual production.