The utility model discloses a grounding wire clip with a cardan joint. The grounding wire clip can rotate by any angle and is suitable for conductors of various geometrical shapes. The grounding wire clip comprises a guide rail, wherein an upper line pressing plate and a lower line pressing plate are connected with the guide rail through connecting flexible lines, a support which is perpendicular to the guide rail is arranged at the lower end of the guide rail, a grounding wire hole is arranged on the right portion of the support, the upper line pressing plate and the lower line pressing plate are connected with the grounding wire hole through connecting flexible lines, double-helix screws with double-helix screw shafts are in threaded connection with the upper line pressing plate and the lower line pressing plate, shaft holes are arranged on the support, double-helix screw shafts penetrate through shaft holes and are connected with the cardan joint, spring pins are fixedly connected with penetrating ends of double-helix screw shafts, a flexible shaft is connected inside the cardan joint, and an operating rod is connected at the lower end of the cardan joint.