Display panel, display mother board and display device

The invention provides a display panel, a display mother board and a display device. The display panel comprises a display substrate which comprises a display area and a peripheral area; the light-emitting elements are arranged on the surface of one side of the display area of the display substrate; the packaging cover plate is arranged on one side, far away from the display substrate, of the light-emitting element; the supporting columns are arranged between the display substrate and the packaging cover plate and distributed in gaps of the light-emitting elements, and the orthographic projection of the supporting columns on the plane where the display substrate is located comprises a main body area and a plurality of branch knot areas connected with the end of the main body area; the main body area is located between the adjacent light-emitting elements, and any branch knot area is located between the adjacent boundaries of the two adjacent light-emitting elements.