Abstract: To meet the needs of the design of the seamless steel tube continuous rolling process and the production management,the practical performance-prediction software for the seamless steel pipe continuous rolling process is developed with the MATLAB APP.Based on the blank size and the process parameters,the said software is used to work out the modules for in-process prediction of the parameters of each individual roll stand such asp wall thickness,outside diameter,speed and rolling force etc.Furthermore this software has been also used to predict the actual rolling force of a 2-roll,6-stand mandrel mill as is located at a certain domestic steel works,and is producing theΦ165 mm seamless steel pipe.