The invention provides a wire clamp fixing device, and belongs to the technical field of electric power construction tools. The device comprises a fixing frame which is buckled on a wall, wherein receding grooves used for allowing an open wire to pass through are respectively formed at two ends of the fixing frame; a fixed plate is fixedly arranged at one end of the fixing frame and located on theside away from the wall. A pressing block is arranged in the fixing frame in a sliding mode, a wire clamp is pressed in the fixing frame through an elastic assembly, and is close to one side of the fixed plate. A side, away from the wall, of the pressing block is provided with an elastic pressing plate, and the elastic pressing plate extends towards one side of the fixed plate and is matched withthe fixed plate for clamping steel nails on the wire clamp. According to the invention, a worker does not need to hold the wire clamp and the steel nail with hands, only needs to hold the fixing frame and press the fixing frame on a wall body for installing an open wire, and when the steel nail is knocked by using the hammer head, the problem of hurting hands is avoided.