从管道模型的基本原理出发,本文论述了华北落叶松单木累计叶量的空间垂直分布形式及叶量、叶面积的估测方法。对国外同类研究中由胸高边材估测叶量所存在的问题提出了本文的观点。总结出两种估测叶量、叶面积的新方法,即削度方程法和胸高断面积生长量法,该方法具有外业测定简单,估测精度高的优点。 Starting from the basic principle of pipeline model, this paper discusses the vertical spatial distribution of leaf mass and leaf area and leaf area in Larix principis-rupprechtii. This paper puts forward the viewpoints of the existence of leaf mass in the researches of foreign countries by estimating the amount of leaf in the chest high and sapwood. Two new methods for estimating leaf area and leaf area are summarized, that is, taper equation method and growth area of ​​thoracic area. The method has the advantages of simple measurement and high estimation accuracy.