Abstract: The scale on the hot-rolled steel plate with weak texture was analyzed by XRD first,then the obtained XRD patterns were refined by Rietveld whole pattern fitting method with Highscore plus software,and finally the refined results were corrected by preferred orientation correction to realize the quantitative phase composition analysis. The effect of preferred orientation correction on the fitting results was also studied. The results show that Rietveld fitting criterion with preferred orientation correction was smaller than that without preferred orientation correction,and the refined results were more correct after preferred orientation correction. All results of Rietveld whole pattern fitting were convergent,and fitting criterion such as Rp,Rwp and X were all small.