The utility model relates to the technical field of wire clamps. The utility model further discloses an insulating fixture for the starting end and the tail end of power transmission. Including a base, the top of the base is fixedly connected with an insulating column. The top of the insulating column is fixedly connected with a movable sleeve; when the device is used, the operation is simple; during installation, the two connecting rods are pressed downwards; the clamping block penetrates through the space between the limiting clamp and the U-shaped clamp; laying-down connecting rod, under the elastic action of the extrusion spring; the limiting clamp and the U-shaped clamp can clamp the end of the electric wire; compared with an existing rope winding and binding mode, the installation operation is faster and more convenient to detect; branch laying, firstly, the two connecting rods are pressed; the connecting rod drives the extension spring to pull the movable block downwards, at themoment, the electric wire end can be taken down from the device, branch circuit laying can be conducted at the moment, through the operation mode, inconvenience caused by unbinding of a winding ropecan be avoided, operation is easy, end cutting operation is avoided, and wiring operation is more convenient.