The invention discloses an array substrate, a manufacturing method of the array substrate, and a display device, wherein through the array substrate, the manufacturing method of the array substrate, and the display device, production cost is reduced, metal subsequently deposited in through holes in the periphery is protected, and the situation that the metal does not well adhere to resin is avoided. The manufacturing method includes the steps of sequentially manufacturing a grid electrode, a grid electrode insulating layer, a semiconductor active layer, a source electrode, a drain electrode, a first passivating layer, a pixel electrode, a second passivating layer, a storage capacitor upper substrate and a third passivating layer on a lining substrate, and etching the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole in the third passivating layer, wherein the first through hole is located above the drain electrode and penetrates through the first passivating layer, the second passivating layer and the third passivating layer, the second through hole is located above the pixel electrode and penetrates through the second passivating layer and the third passivating layer, the third through hole is located above the storage capacitor upper substrate and penetrates through the third passivating layer, the fourth through hole is located above the source electrode in a surrounding lead area and penetrates through the first passivating layer, the second passivating layer and the third passivating layer, and the fifth through hole is located above the grid electrode in the surrounding lead area and penetrates through the grid electrode insulating layer, the first passivating layer, the second passivating layer and the third passivating layer.