Abstract: Compared are the development speeds and development peaks of the seamless steel-making industries in the five major steel-tube producing countries,i.e.,the U.S.A.,Japan,Germany,Italy and the former USSR region.Briefed is the quick development of the domestic seamless steel tube-making industry and the major newly-built tube mills over the last five years.Also summarized are the main aspects concerning the said development,including R & D of new products,technological improvement,localization of the equipment,modification of small-sized tube mills and rationalization of ordinary tube mill distribution,etc.It is emphasized that caution should be exercised to prevent further blind investments to expand production facilities and capacity.