The invention discloses a wire crossing device for power stringing, and the device comprises a pedestal fixedly disposed at the upper end of an insulating rod, and an upper cover which is hinged to the pedestal in a buckled manner. The interior of a pedestal groove of the pedestal is provided with a return pulley, and the interior of an upper cover groove of the upper cover is provided with an auxiliary wheel through an adjustment device. The outer wall of the pedestal is fixedly provided with a supporting rod, and the tail end of the supporting rod is hinged to a transmission rod. The upper end of the transmission rod is hinged to an upper connecting rod, and the upper end of the upper connecting rod and the outer wall of the upper cover are hinged together in a corresponding manner. The lower segment of the transmission rod is slidingly provided with an upper sliding sleeve in a sleeving manner, and the central part of the upper sliding sleeve is hinged to an insulating bar which extends downwards. The insulating rod is fixedly provided with a central sliding sleeve which is in sliding fit with the insulating bar in the axial direction. The upper part of the insulating rod is provided with a swinging cavity which cooperates with the lower segment of the transmission rod. The device can be quickly assembled and set up, can complete the wire crossing, selection and leading functions on the ground, is simple in operation, does not need climbing, and is high in safety.