作者提出的变型Ｗｅｉｂｕｌ分布模型是以Ｗｅｉｂｕｌ分布密度函数为基础，进行适当变换形成的４参数分布模型。用该模型对海南省热带山地雨林的林分结构规律进行研究，结果表明，该模型具有灵活性强、适应性广的优点，对异龄林和同龄林皆适用，并能提高模型参数的估计精度。同时本研究改善了χ２检验模型拟合适度的稳定性，取得了较好的模拟效果。 The modified Weibul distribution model proposed by the author is a 4-parameter distribution model based on the Weibul distribution density function, which is appropriately transformed. The model was applied to study the stand structure of tropical montane rainforest in Hainan Province. The results show that the model has the advantages of flexibility and wide adaptability. It can be applied to both heterogeneous forest and the same age forest and can improve the estimation of model parameters Accuracy. At the same time, this study improved the fitting stability of χ2 test model and achieved good simulation results.