Single-layered color cholesteric liquid crystal display devices and fabrication methods thereof are provided. The color cholesteric liquid crystal display device includes a first substrate structure having a base and periodic protrusion banks. A second substrate structure is disposed opposite the first substrate structure to enclose the periodic protrusion banks, and divide a plurality of color sub-pixel channels. A plurality of color cholesteric liquid crystals are respectfully filled in each of the color sub-pixel channel, wherein the base and the periodic protrusion banks are made of continuously integral material.