A manufacturing method of a display panel and the display panel are provided, wherein the display panel includes a base substrate, a first metal layer, an insulation layer, an active layer, a second metal layer, and a passivation layer. The passivation layer corresponding to a bonding area further includes hole structures. Surface materials of the second metal layer corresponding to the hole structures are a third metal material. Reducing materials are introduced to make a surface of the second metal layer form the third metal material during a preparation.