The utility model provides a wire clamping device for an electric power circuit. Wherein the main plate, the connecting plate, the pull arm and the pull ring are sequentially hinged. The front end ofthe connecting plate is hinged with the front end of the mainboard; the connecting plate and the main plate are respectively provided with an upper jaw and a lower jaw which correspond to each other,the main plate is connected with a first hinge shaft at the front end of the connecting plate and a U-shaped connecting rod, the tail of the U-shaped connecting rod is connected with an L-shaped pullrod, and a limiting pin for limiting downward movement of the U-shaped connecting rod is arranged at the bottom of the main plate. According to the wire clamping device for the electric power circuit,an operator can complete the operation of recovering the wire clamping device with one hand, the risk that an electric power worker takes up the wire clamping device at high altitude can be reduced,and the working efficiency is effectively improved.