Abstract: Evaluation of the structure and stability of Zhangmu Deposit means a lot to Zhangmu Port, the only international overland trading port between China and Nepal, which is located on it and has faced the threat of geological disasters over a long time. To demonstrate the stability of the slope, the engineering geological structure and soil-rock mixture types of Zhangmu Deposit along with the slope deformation and failure laws are preliminary analyzed based on the field survery. Results show that, Zhangmu Deposit is composed of not just one single soil structure, but includes colluvial, residual and glaciofluvial deposits amongst others, and the slope less likely slides as a whole, but will mainly slip partially controlled by the terrain and human engineering activities.