Color film substrate and preparation method thereof as well as display device and preparation method thereof

The invention provides a color film substrate and a preparation method thereof as well as a display device and a preparation method thereof, and relates to the field of a display technology. A structure capable of irradiating the whole sealing glue can be provided to completely solidify the sealing glue of the display device, and the color film substrate and an array substrate have a good box effect. The color film substrate comprises a black shading layer which is arranged in an area outside a sealing glue area of the color film substrate. The preparation method of the color film substrate and the preparation method of the display device provided by the invention are applicable to the preparation of the color film substrate and the preparation of the display device including the color film substrate.