Abstract: Analyzed in the paper is the mechanism of running deviation of the steel strip as being delivered during the process of the front-swing HSAW pipe mill.According to number of factors as causing the said running deviation of the steel stripe,improvement actions are proposed.Accordingly,the problem of steel strip deviating upward the drive side of the upper delivery roll is corrected.Based on the analysis,it is identified that the root cause for the said deviation is the difference between the elastic deformation amount of the steel strip and that of the contacting section of the delivery roll.Therefore the fault of steel strip running deviation fault can be restrained,and even corrected by means of such measures as properly determining the pressure of the delivery machine,accurately setting the position of the vertical roll,and adding a guide plate device in front of the delivery machine.In general,it is proposed that when dealing with the strip running deviation issue,all the causes should be considered comprehensively,and multi proper measures should be taken to effectively control the occurrence of the faulty phenomenon.