In order to study the color development effect of colored fibers in the color spinning process, the mixing mode of the mixed color spinning was designed and the mixing effect was predicted. Using the three-channel ring digital spinning machine as the platform, the five primary colors of cyan ( C), magenta (M), yellow (Y), black (K) and white (W) were used as the primary color of the roving, and the hue, brightness and color of the color spinning were controlled by different mixed color spinning modes such as single channel, double channel and three channels. The mechanism of saturation gradient change was adopted to construct a mixed color chromatography system of CMYKW five primary fiber. The appearance of the mixed color yarns with red, yellow and cyan primary color brightness and saturation gradient was designed. Based on this, the spinning process was designed and six kinds of mixed color yarns with brightness and saturation gradient changes were produced. The strength, strip and hairiness of the six types of mixed yarns were tested, and the effects of the blending of the color fibers on the strength, the stem and the hairiness of the three-channel digital mixed yarn were analyzed. The results show that the complete chromatographic system can obtain the CMYK value of the target color intuitively and quickly, and improve the proofing efficiency of the color yarn. As the difference in blending ratio increases, the drying, breaking work and strength deterioration of the mixed yarn will be more serious, the beneficial hairiness will be reduced and the harmful hairiness will increase.