Building construction temporary power cable supporting device

The utility model relates to the technical field of temporary cable supporting, and discloses a building construction temporary power cable supporting device which comprises a supporting frame, external threads are arranged on the surface of the supporting frame, and a hand wheel is installed on the surface of the supporting frame through the external threads in a threaded mode. According to the utility model, components such as the hand wheel, the supporting legs and the reset spring are arranged, when a cable is supported, the hand wheel is rotated to move downwards to extrude and push the movable ring to move downwards, so that the lower ends of the three supporting legs which are equidistantly hinged to the surface of the movable ring deflect outwards at the same time, and the included angles between the supporting legs and the supporting frame are increased; the three supporting legs can provide stable supporting force for the supporting frame, the placing stability of the device is improved, when the su