刺槐是重要的用材树种之一，通过研究其木纤维分子的长度、宽度与材积生长量的关系，可知其木纤维分子长度、宽度变化规律与其胸径生长量的变化规律有共同的特点。且木纤维分子长度、宽度达到最大值时的年龄和刺槐的数量成熟龄相一致。由此可做为幼年材和成熟材、幼龄林和成熟林的划分标准，同时为更好地进行森林经营提供理论依据。 Robinia pseudoacacia is one of the important timber species. Through the study of the relationship between the length and width of wood fiber molecules and the volume growth, Robinia pseudoacacia has the common characteristics of the change rule of wood fiber length and width and the variation of DBH. And the length of wood fiber, the maximum width of the age and the number of mature black locust age consistent. This can be used as a juvenile and mature timber, young and mature forest standard division, and to provide a better theoretical basis for forest management.