The utility model provides a wire clamping device for hanging a label. The device comprises a wire clamp, a label, a support frame and an insulating rod, the wire clamp comprises a first clamping piece and a second clamping piece. the first clamping piece and the second clamping piece are rotationally connected through a rotating shaft; a torsion spring is arranged on the rotating shaft; the top of the first clamping piece is rotationally connected with a metal supporting rod. a magnet is arranged at the lower part of the second clamping piece; the metal supporting rod is supported on the magnet so as to prop open the first clamping piece and the second clamping piece; the first clamping piece is provided with a through groove so as to avoid interference with rotation of the metal supporting rod, the sign is fixedly connected to the lower portion of the wire clamp, the supporting frame is provided with a sign containing groove used for containing the sign, and the insulating rod is fixedly connected with the supporting frame. The utility model provides the wire clamping device for hanging the sign, which is simple and convenient to operate and high in safety.