The invention discloses a wire pulley, and relates to the technical field of electric power facilities. The wire pulley comprises a wire hanging wheel I, a wire hanging wheel II, and a beam. The wire hanging wheel I and the wire hanging wheel II are arranged on the beam through a wire hanging wheel carrier I and a wire hanging wheel carrier II respectively, and the wire hanging wheel I and the wire hanging wheel II are arranged above the beam. The two ends of the beam are each equipped with a driving element. The lower ends of the wire hanging wheel carrier I and the wire hanging wheel carrier II are each connected with a rope. A ground operator makes the wire pulley cross a spacer through the driving elements. An operator standing on an end face operates the driving elements to make the wire pulley smoothly bypass a spacer and reach a defective part of a wire and to lift tools such as a ladder to the height of the wire with the help of the ropes bypassing the lower parts of the wire hanging wheel carrier I and the wire hanging wheel carrier II so as to handle the defect of the wire easily. The wire pulley has the advantages of simple structure and convenient and quick operation, and reduces the labor intensity of workers. With the wire pulley, the operation time is saved greatly, and the construction cost is reduced.