Abstract: Addressing the problem as staying with a certain domestic Accu Roll pipe mill，a modified long guide-roller device is proposed with reference to the outlet table structure of the Assel pipe mill.Analyzed are the loading states of the shell on differentoutlet tables of the rotary pipemill.Detailed are the performance characteristics of themodified long guide-roller device.The analysis result reveals that the two press rollers and the two long guideroller of the device together form a guide position as encircled by four“guide-rollers”so as tomake it uneasy to get the shell swung off the rolling line.Such a device leads to fixing of the problem with the Accu Roll pipe mill that scratch is caused to the shell surface due to its twisting and swing during the rolling process.As a result，the rolling speed of the mill is enhanced，and so are the production cycle and output.