A display panel and a fabricating method thereof are provided. The display panel is provided with a bending region and a non-bending region. The display panel has a flexible substrate, a first line layer, an insulating layer, and a second line layer, which are layer-stacked. The first line layer has first lines. The insulating layer corresponding to each of the first lines is provided with at least two through holes penetrating the insulating layer. The through holes are defined at two ends of the bending region adjacent to the non-bending region. The second line layer has second lines. The second lines are aligned with the first lines in a one-to-one manner. The second lines extend and penetrate the through holes to electrically connect to the first lines. The fabricating method has steps: providing a flexible substrate, fabricating a first line layer, an insulating layer, a second line layer.