The invention discloses a color film substrate, an array substrate, a display panel and a display device and belongs to the technical field of displays.The color film substrate comprises a first substrate and at least one row of color light filter layers arranged on the first substrate.Each row of color light filter layers comprises multiple light filters arranged in parallel, and each light filter is of a curve structure.Any two adjacent filters in the same row of color light filter layers are different in color and are spaced by a light blocking strip with a curve structure existing between the two adjacent filters.The color film substrate comprises the multiple light filters arranged on the first substrate arranged in parallel, the light filters are of the curve-shaped structures, and the light cross sections formed on the light filters are of the curve structure, so that the interface area of each color of light with the color light adjacent to the color of light is larger, and a color mixing effect is improved.