The embodiment of the invention provides a sub-panel, a display panel, a
display device and a manufacturing method of the display panel. The sub-panel comprises a first substrate; the first substrate is provided with a splicing edge; the light-emitting layer is arranged on one side of the first substrate, and the light-emitting layer comprises a plurality of light-emitting units which are arranged at intervals; the packaging layer is arranged on one side, deviating from the first substrate, of the light-emitting layer; the light shielding layer comprises a
first light shielding part and a second light shielding part which are arranged on the side, facing the first substrate, of the packaging layer, the
first light shielding part is located between the adjacent light emitting units, and at least part of the second light shielding part is located on the
peripheral side of the packaging layer; wherein the second shading part and the packaging layer are arranged in a protruding manner relative to the first substrate, so that when the at least two sub-panels are mutually spliced to form the display panel, the second shading part can cover a splicing seam between the two adjacent sub-panels, the display difference of the splicing seam position is reduced, and the use performance of the display panel is improved.