The disclosure discloses a display panel, a manufacturing method thereof and a display device. The display panel includes a backing substrate, a first active layer arranged over the backing substrate, and a second active layer arranged on a side of the first active layer away from the backing substrate. The first active layer and the second active layer each comprise a conductor region, and perpendicular projections of the conductor regions of the first and second active layers on the backing substrate have an overlapping region. A part of the conductor region of the first active layer corresponding to the overlapping region forms as a first electrode, a part of the conductor region of the second active layer corresponding to the overlapping region forms a second electrode, and the first electrode and the second electrode form two electrodes of a capacitor.