Abstract: The fracture of Daxian-Wolonghe River Wet Gas Pipeline and the hazards of ferric sulfide powder produced in dry gas pipeline are analyzed in detail. It is pointed out that the construction quality of gas pipeline is vital to the future safe operation of wet/dry gas pipelines. The effective manner to increase pipeline transportation productivity and elongate the service life of pipeline is to adopt the dry gas transmission technology. In the light of lowering the ferric sulfide powder of pipeline and enhancing the technology.