The present invention provides a display panel, a display device, and a method for manufacturing the display panel. The display panel includes: an array substrate, a color film substrate, a sealant, and a retaining wall. The retaining wall is arranged between the array substrate and the color film. Between the substrates, it is in sealing contact with the array substrate and the color filter substrate, and is located inside the sealant to enclose the display area of the display panel, wherein, between the retaining wall and the sealant The containing space is filled with liquid crystal. The retaining wall of the display panel acts as a secondary seal, and the liquid crystal fills the gap between the retaining wall and the frame sealant, which further acts as a seal. It has excellent airtightness and can prevent the sealant from breaking or poor coating When the external gas and impurities interfere with the inside, the peripheral blackening and Mura phenomenon are caused, and the box thickness is uniform, the stability is strong, the picture quality is good, and the display quality is high.