The present disclosure relates to a display panel, a packaging cover plate, and a method for manufacturing a packaging cover plate, and relates to the field of display technology. The packaging coverplate comprises a substrate, a color film layer and a barrier layer. The color film layer is disposed on one side of the substrate, and comprises a pixel defining layer and an optical filter layer separated into a plurality of sub-pixels by the pixel defining layer. The barrier layer is disposed on a side of the color film layer away from the substrate and is capable of blocking a gas. The packaging cover plate of the present disclosure can improve a packaging effect and ensure a display effect.