Abstract: Described in the article is the development history of the retained mandrel pipe mill, covering analysis of the features of the retained-mandrel pipe mill at different stages of its development from the point of view of technological application, and focusing on characteristics of PQF mill in manufacturing process and equipment configuration. The rolling force imposed upon the mill frame and the roll stand of PQF mill is also roughly analyzed, and relevant technological issues are discussed and the future development of such type of pipe-rolling mill is looked ahead.