Abstract: Briefed here in the paper are the application，the market challenge，the current production situation and the technological quality standard，etc. of the extra large-sized seamless steel tube. Also focused on detailed elaboration of the domestic production process and the present development situation of the said tube. Furthermore comparative introduction and analysis are conducted，involving the process principle，the material，the flow，and the advantages and disadvantages of different processing methods for the extra large-sized steel tube as well as the configurations and product statuses related to the tube production of relevant domestic companies. Finally suggestions are proposed concerning issues such as the future development direction of domestic steel tube industry，the homogenization in the wall thickness direction of the material performance，the improvement of the wall thickness uniformity，the precision processing of extra light-walled steel tube，and the processing of hi-alloy and special alloy.