Abstract: On the basis of analyzing geological, topography and mining methods of west to east second natural gas pipeline DD245-DD246 tenders, the study analyzed and calculated secondary geological disasters of collapsible macroporous loess gully terrain and its harm degree affected by mining. Probability integration model that introduced additional mobile function is used to predict ground movement and deformation caused by coal mining, and analyzes and evaluates influence degree of mining subsidence surface on gas pipeline. The risk level of the study area is given by the corresponding evaluation, and appropriate safety treatment measures is given according to the risk level.