The utility model relates to a universal high-altitude wiring clamp, and the wiring clamp mainly consists of a clamp head, a telescoping rod, and a mechanical mechanism, wherein the mechanical mechanism has functions of dead locking and unlocking. During unlocking, only the weight of the rod needs to be overcome. The telescoping rod is connected with a prolonged insulating rod, and can be prolonged to an appropriate height according to the needs. The wire clamp is suitable for on-site application, and enables the testing and maintenance of conventional electrical equipment to be completed on the ground. Moreover, the height can be changed randomly, thereby completely avoiding the risks caused by high-altitude operation.