利用综合Ｇａｍａ密度函数研究火炬松人工林的结构规律，其标准地拟合率为８７．７８％，高于其它密度函数。根据综合Ｇａｍａ密度函数的４个参数与林分因子的相关性，建立其参数与林分因子的预估方程，配合火炬松生长模型，预测某一状态林分的结构和产量，其变异系数为０．１２９２，预测精度大于８５％ The structure law of Pinus taeda plantation was studied by comprehensive Gama density function. The standard fitting rate was 87.78%, higher than other density functions. Based on the correlation between the four parameters and the stand factors of the integrated Gama density function, the prediction equations of parameters and stand factors were established. With the growth model of Pinus taeda, the structure and yield of some stand were predicted. The coefficient of variation 0.1292, prediction accuracy is greater than 85%