The disclosure discloses a display panel, a preparation method thereof and a display device. The display panel includes: a base substrate, a plurality of light emitting devices located on the base substrate, and a film packaging structure located on a side, away from the base substrate, of the light emitting devices, wherein the film packaging structure includes a first inorganic packaging film on the side, away from the base substrate, of the light emitting devices, a second inorganic packaging film on the side, away from the light emitting devices, of the first inorganic packaging film, and an organic packaging film between the first inorganic packaging film and the second inorganic packaging film; and the first inorganic packaging film is provided with convex structures at gaps among the light emitting devices, and the organic packaging film is disconnected at the convex structures.