The present disclosure discloses a display panel, which includes a thin-film transistor arranged on a substrate, an electroluminescent diode arranged on the thin-film transistor, which includes a bottom electrode, a light emitting layer, and a top electrode, and a thin-film encapsulation layer covering the electroluminescent diode. The display panel further includes an auxiliary electrode and a lead wire of the top electrode of the electroluminescent diode. The auxiliary electrode is electrically connected to the lead wire of the top electrode of the electroluminescent diode by penetrating through a via hole of the thin-film encapsulation layer. Arrangements of the present disclosure provide a display panel and a manufacturing method thereof and a display device including the display panel.