Objective In order to improve the color copy fidelity of the digital output device, this paper presented a new color gamut mapping algorithm. Methods With the improved algorithm of convex hull algorithm based on color gamut boundary description, the ECI 2002 color table, IT8.7/4 and TC3.5 were the objects of feature extraction, a new gamut mapping algorithm was proposed in this study, namely, the neighboring replaced mapping algorithm based on the feature points. Through experiment on Epson Stylus Pro 7910, subjective and objective evaluations were conducted for the application effect of this mapping algorithm. Results The experimental results showed that the matching effect of the two algorithms was good. Conclusion According to the final Z score sheet, the neighboring replaced mapping algorithm based on the ECI2002 had the best application effect.