Abstract: Slope factor plays an important role in the design of mountain pipeline, and no one particular slope index can comprehensively reflect the relation between the fractal feature of slopes in the region and many important project quantities in the construction of mountain pipeline. This paper confirms the distribution general of slope in pipeline route with MAPGIS technology to determine the distribution general of different slopes in the region, and carries out a study on the fractal feature of slopes in the regions that pipeline will cross over with the fractal method and the variable dimension fractal method, so that the fractal feature and accumulated feature of slope distribution can be discovered to get the fractal dimension value of different slope sections by calculation. Combined with the development tendency of geological hazards in the region, the quantity of hot bending pipe and that of hydrotechnological protection designed in pipeline installation drawing, the paper discusses the relation between the fractal dimension value and said situations, and the results can provide effective design basis and technical methods to the design of mountain pipeline.