Abstract: Northwestern China is rich in oil and gas resources. In recent years the regional pipeline-network gas has been constructed in.northwestern China, which plays an important region's oil and gas industry. The topography, geological structure and environment role in the development of the northwestern China are rather complicated due to its unique geographic location and climate.geological hazards. In order to assure the safety of the oil-gas pipeline Thus the region is prone to a varieties of network, the region's geological hazard has to be investigated systematically. In addition, the proper counter-measure of the prevention of geological hazard has to be worked out clearly. This is also of great importance in the nation's campaign of developing northwestern region and improving its ecological environments.