Mountain pipeline engineering is a critical indicator of a nation's energy infrastructure capabilities.This type of project must integrate multiple requirements, such as energy supply, engineering technology, environmental protection, and safety management, under complex geological and climatic conditions, forming a highly complex systematic engineering endeavor.Given the frequent occurrence of geological hazards in mountainous regions, pipelines are particularly vulnerable to landslides. Thus, effective disaster prevention and control measures are essential to minimize potential damage.This study investigates two landslide-induced pipeline failure events that occurred in 2017 and 2018 along the China-Myanmar natural gas pipeline (Qinglong Section, Guizhou Province). By combining geological and environmental conditions with on - site accident investigation data, and based on the finite element solid contact model, the force and deformation characteristics of the natural gas pipeline under the action of landslides are analyzed to determine the causes of the accidents. The results indicate that the deflection of the pipeline follows an approximately normal distribution when subjected to landslide forces. Stress concentrations are most pronounced in the central and boundary regions of the pipeline, making these areas highly susceptible to failure. An accumulation of soil atop the slope, where the pipeline is placed, can cause significant axial tensile stress in the pipeline. This condition can lead to brittle crack damage, especially at the pipe body or girth weld defects, resulting in gas leakage and explosion. Therefore, in subsequent maintenance operations, it is essential to prevent significant external disturbances, particularly the accumulation of large soil masses on slopes above the pipeline, to ensure long-term operational safety.