Abstract: The method that can predict the seam puckerone of parameters to affect sewing quality is discussed.Sixteen typical fabrics are selected.FAST testing system is used to get some main mechanical properties of these fabrics,out of them three principal components are integrated by means of principal component analysis(PCA).The seam pucker is evaluated by subjective and objective methods.Grey prediction model of seam pucker is developed on the parameters of principal components,which is valid by test.