Abstract: The general situation of Jiangzhi-Duzhou gas transmission pipeline, application of new process and technology, pipeline construction in drying condition and operation management are introduced in the paper. The reason and hazard of engendering of ferric sulfide, and its continuous engendering and moving within pipeline are analyzed. The problems existed in the operation management in dry gas transmission are analyzed, and suggestions to decrease the ferric sulfide produced during the transmission are presented.