对黄河中游河口镇至龙门区间的产沙岩层与河流悬移质输沙进行了耦合平衡分析，确定了该区间各种产沙岩层的产沙数量，并推算出黄土、基岩和风沙对河流粗泥沙（ｄ＞０．０５ｍｍ）的贡献率分别为６１．２％、３４．２％和４．６％。同时，分析了该区间侵蚀产粗泥沙的分布规律。 Coupling balance analysis was carried out between sediment yield and sediment transport of the river from Hekou town to Longmen section in the middle reaches of the Yellow River. The sediment yield of various sand production beds in the interval was determined and the influence of loess, bedrock and sand on the river flow The contribution rates of coarse sediment (d> 0.05mm) were 61.2%, 34.2% and 4.6% respectively. At the same time, the distribution of coarse sediment in this interval was analyzed.