Array substrate, manufacturing method thereof and display panel

The invention discloses an array substrate, a manufacturing method, and a display panel, which relate to the display technology field and solves the problems that the through hole where current public electrode and the current electrode wire are connected is too deep, and the connection of the public electrode and the public electrode wire is easy to break. The array substrate comprises a substrate, a first signal transmission layer, a first electrode layer, a second insulation layer, and a second electrode layer, wherein the first signal transmission layer comprises a public electrode wire; the first insulation layer covers the first signal transmission layer and is provided with a first through hole on the position corresponding to the public electrode wire; the first electrode layer is arranged on the first insulation layer and comprises a connection electrode which is arranged at the first through hole; the second insulation layer covers the first electrode layer, and a second through hole is arranged at the position corresponding to the connection electrode; the second electrode layer comprises a public electrode which covers the second through hole; and the connection electrode is in contact with the public electrode wire and the public electrode.