通过对长江上游小江流域的地质地貌和水文气象背景分析，并结合动力学模型进行了试验研究。试验中，对水流、泥沙及其运动过程按野外勘测资料和试验要求进行了合理的简化。通过研究提出了小江流域中上游泥沙的活动规律及产沙条件，为小江引水工程的改造提出了有科学依据的可行的实施方案。 Based on the analysis of the geomorphology and hydro-meteorology background of the Xiaojiang River basin in the upper reaches of the Yangtze River, experimental studies are carried out based on the dynamic model. In the experiment, the water flow, sediment and their movement process were reasonably simplified according to the field survey data and the test requirements. Through the research, the law of sediment movement and sediment yield in the middle and upper reaches of Xiaojiang River Basin are put forward, and a feasible implementation plan with scientific basis is proposed for the reconstruction of Xiaojiang River diversion project.