Colorful electronic paper and preparation method thereof

The invention provides colorful electronic paper and a preparation method thereof, belongs to the technical field of display, and can solve the problem that existing electronic paper is single in display color. The color electronic paper comprises a plurality of pixel units, a first substrate and a second substrate, wherein the first substrate and the second substrate are opposite to each other; a micro-structure is arranged on a side surface, which is close to the second substrate, of the first substrate; each pixel unit comprises a first electrode, a second electrode, a color filter and a dielectric layer; each first electrode is arranged on the first substrate; each second electrode and the corresponding color filter are arranged on the corresponding second substrate; each color filter is positioned on one side, which is close to the first substrate, of the corresponding second electrode; each second electrode can reflect light irradiated to the surface thereof; each dielectric layer is arranged one side, which is close to the second substrate, of the micro-structure; and the refractive index of the dielectric layer can be changed under the effect of an electric field formed between the first electrode and the second electrode.