The application relates to a temporary support device of an overhead wire. The temporary support device comprises a main plate and wing plates, wherein the wing plates are connected to the two sides of the main plate and can rotate horizontally, symmetric lifting plate adjustment shafts are arranged at the two sides of the main plate, lifting plates are connected with upper shafts of the lifting plate adjustment shafts, wing plate adjustment shafts are vertically arranged at the outer ends of the lifting plates, the wing plates are horizontally arranged and are in axial connection with the wing plate adjustment shafts, insulation seats are arranged on the surfaces of the wing plates, and wire clamping sleeves are arranged at the upper ends of the insulation seats. Since the above scheme is implemented, the temporary support device can play an effect of temporarily supporting the wire, also can be used for adjusting a temporary support position of the wire so that the wire is very convenient during the wire moving process, and is suitably used for overhead working.