The invention provides an array substrate, a manufacturing method thereof and a display panel. The array substrate includes a substrate, a buffer layer, an active layer, a first insulating layer, a gate electrode, a second insulating layer, a touch signal line, a source and drain electrode, a touch signal line, a source and drain electrode, a first electrode, a planarization layer, and a second electrode. The first electrode and the second electrode are respectively connected to one of the drain electrode and the touch signal line. Thus, photomask processes can be reduced, and production cycle can be shortened.