Abstract: China-Myanmar crude oil pipeline is characterized by a large proportion of mountain slope distribution, complex external environment, and more accident potential hazards, etc. It is of great significance to study the leakage diffusion law of China-Myanmar pipeline slope for the emergency treatment of oil spillage and leakage accidents. Based on the actual operation of China-Myanmar oil pipeline in mountainous area, this paper establishes the experimental model and finite element model of China-Myanmar pipeline slope leakage diffusion, and researches the influence of different leakage speed, slope gradient, slope lithology, and obstacles on the leakage diffusion of oil pipeline slope. The results show that: Large hole leakage and high slope will promote the spreading of crude oil leakage; Rocky slope leakage spreading is the most serious, sandy and gravelly, mixed sandy soil is the second, grassland is the smallest; The size of obstacles affects the diffusion range more significantly, and the installation of additional booms can be considered to inhibit oil diffusion.

Key words: China-Myanmar pipeline, oil spill on the slope, spill spread, scope of impact