Abstract: The data about the concentration of dye liquor,absorbency and dye uptake,can be used for dyeing rate′s curve fitting on MatLab.Since the relation between the concentration of dye liquor and absorbency follows Lambert-Beer law, standard curve and equation can be established based on the correlation of a set of known concentrations of dye liquor and absorbency.Testing the absorbency of the dye liquor at a group of time-series,the corresponding dye uptake can be determined according to the standard curve.Combining the dye uptake with the time,the dyeing rate curve can be founded with a range of absorbency data in different time corresponding with standard curve.The dyeing rate curve is preserved finally both in multinomial and figure on MatLab.The detail of the data processing about the dyeing rate on MatLab,is showed in the paper.