The aim of this work was to study 3D color printing based on UV ink. When paper was used as the substrate, yellow, magenta, cyan, black and white patches with different ink layers and IT8.7-3 CMYK 5.0.5 standard version were printed on five pieces of paper with the same type using UV ink-jet printing. Then the thickness and color reproduction of different ink layers and the effect of white ink on color gamut were compared and analyzed. In terms of yellow, magenta, cyan, black and white ink, the stronger penetration and spreading effect of 1st ink layer on the paper surface influenced the precision of height. With increasing ink layers, the brightness of yellow, magenta and cyan ink gradually decreased, and the hue gradually deviated. Color shifting of paper could be improved after printing a uniform layer of white ink on the paper, and the color reproduction of white ink was better. In conclusion, to realize UV ink-jet 3D color printing, a scheme was proposed which achieved the height of 3D model with multilayer of white ink and the color of 3D model with several layers of color ink.