As one main type of buried pipeline passes through the mountain areas, the disaster-causing mode of longitudinally buried pipelines subjected to landslide has a significant difference compares to that of the horizontal buried pipelines caused by landslides. the deformation mechanism and disaster reduction countermeasures of horizontally arranged buried pipelines are not suitable for longitudinally arranged buried pipelines.In this paper, ABAQUS finite element software is used to study the deformation and failure law of buried pipeline under the action of longitudinal landslide, and the influence of landslide geometry on the deformation and failure of a pipeline is analyzed. The effect of changing the diameter-thickness ratio, buried depth, and internal pressure on reducing the deformation and failure of buried pipelines caused by a landslide is discussed. The results show that: (1) the maximum strain of buried pipeline affected by landslide occurs in the toe section of the landslide. (2) the strain of buried pipelines increases with the increase of slope, thickness, and length of landslide. among them, the thickness of landslide has the most influence on the deformation and failure of pipelines subjected to landslide, followed by the length of landslide, and finally the slope of landslide. (3) Reducing the diameter-thickness ratio, buried depth and internal pressure of the pipeline can effectively enhance the strength of the pipeline. considering the difficulty of pipelines construction, cost, disaster reduction effect, and operation management, the best plan is to reduce the diameter-thickness ratio of the pipeline, the second is to change the internal pressure of the pipeline, and finally to change the buried depth of the pipeline.