通过模型试验，研究不同类型（粘性、稀性、水石流）和不同规模（Ｐ＝２％、４％）的泥石流在古乡沟堆积扇上的运动和冲淤规律，同时进行防治工程模型试验研究，结合野外调查和资料对比，选择合理的防治工程方案，为工程设计提供可靠的依据和数据。本文结论对川藏公路与古乡沟类似灾害的整治有一定的参考价值 Through the model test, the movement and scouring and deposition rules of different types of debris flow (viscous, dilute, water stone flow) and debris flows of different scales (P = 2%, 4% Research, combined with field surveys and data comparison, select a reasonable program of prevention and control project for the engineering design to provide a reliable basis and data. The conclusion of this paper is of certain reference value for the treatment of similar disasters in Sichuan-Tibet Highway and Guxianggou