Abstract: The collapsible loess landslides In Xinzhai of Shanxi is taken as an example. The landslide on its side of the west-east gas transportation pipeline becomes a serious potential threat. Through investigation and engineering geological mapping using geophysical exploration and prospecting tools, the engineering geological conditions on slope stability and landslide causes are analyzed in detail. The landslide safety factors are determined according to the landslide environmental conditions and its steady state. Indoor soil tests and calculation are performed to determine the sliding surface saturation, c and φ. The landslide thrust is calculated and derived using the limit equilibrium method, and gravity sliding retaining wall is constructed at the landslide leading edge according to the results. The approach ineffectively solves the collapsible loess landslide hazard on the gas pipeline, and ensures the safe operation of the gas pipelines.