Abstract: Based on the analysis on the situations of both the domestic and world markets facing the domestic O.C.T.G. industry as well as the development and characteristics of restructuring among steel tube makers throughout the world, it is concluded that restructuring is an inevitable development trend of the sector to follow the domestic and world markets, and that while powerful-weak consolidations are popular, more and more powerful-powerful consolidations are emerging. In addition, opinions concerning restructuring among domestic O.C.T.G. makers are put forward, covering such aspects as principle, scope, model and measures.