Abstract: Briefed are the application scope and current supply-demand situation of large-sized seamless steel tubes.Analyzed are the problems concerning development of production of large-sized seamless steel tubes in the country.Forecast are the consumption and production trend of seamless steel tubular products in the coming years up to 2010.Also described in the paper are some issues ralated to the development of production of large-sized seamless steel tubes,including the manufacturing processes and equipment characteristics of different largesized pipe mills,and comparisons of the processes and mills with respect to their product size ranges,yields,steel grades,and production capacities,etc.Moreover suggestions for selection of manufacturing equipment for domestic production of large-sized seamless steel tubes are put forward.