Display panel, preparation method thereof and display device

The invention relates to a display panel, a preparation method thereof and a display device. The display panel includes: a substrate; the partition structure is arranged on one side of the substrate and defines a plurality of partition openings; the plurality of sub-pixels are correspondingly arranged in the plurality of partition openings; the orthographic projection of the partition structure on the substrate defines a plurality of closed patterns which correspond to the partition openings and are arranged at intervals; the closed graph is provided with a first virtual straight line and a second virtual straight line which penetrate through the closed graph, the first virtual straight line is parallel to a first direction, and the second virtual straight line is parallel to a second direction; in the closed graph, edges located on the two sides of the first virtual straight line are not parallel to the first virtual straight line; and/or the edges located on the two sides of the second virtual straight line