Abstract: The glaciers downstream of the Yarlung Zangbo River are widely distributed, with frequent occurrences of rock-ice avalanches. These avalanches often lead to secondary disasters, such as debris flows or avalanches, causing significant damage. Through field investigations, combined with multi-phase remote sensing images and aerial photography, this study analyzes the geomorphic characteristics and dynamic effects of high-altitude disasters in the Zelongnong Basin. The research results reveal the following: Due to the significant vertical drop, the Zelongnong Basin exhibits typical vertical zonality. The distribution characteristics and morphology can be categorized into three geomorphic types: high and steep glacial micro-geomorphology, curved gully micro-geomorphology, and deposit micro-geomorphology. The progression of the rock-ice avalanche disaster chain can be divided into four stages: rock-ice avalanches, debris flows, river blocking, and flooding. Debris flows exhibit complex dynamic effects, primarily including impact disintegration, soil-rock mixture arching, dynamic erosion, and debris deposition. These aspects provide valuable information for studying the flow behavior and dynamic processes of particles. Moraine accumulation is concentrated at the ice tongue, with numerous cracks distributed at the front and rear edges of the ice tongue. Over time, internal cracks expand and accumulate, leading to a decrease in stress arch bearing capacity and subsequent damage. In the future, under the influence of climate change and strong tectonic activity, the risk of rock-ice avalanches in the downstream Yarlung Zangbo River is extremely high. Early warning systems and risk mitigation measures for basin disasters should be prioritized.