The utility model relates to the technical field of cables, provide a single core cable fixation clamp very much, including base, retaining member and signal detection emitter, the base is the U -shaped, is provided with horizontal fixed orifices and screw hole A on it, the retaining member is omega shape, and both ends be the fixed block, and the one end fixed block is rotationally articulated with the base, is equipped with screw hole B on the other end fixed block, corresponds with the screw hole A of base, and the screw passes screw hole A and screw hole B fixes base and retaining member, signal detection emitter includes temperature sensor and converter, and temperature sensor transmits the temperature signal who senses for the converter, and the converter changes temperature signal into the signal of telecommunication, transmits the conversion display device for the outside through the wire. The utility model discloses the base was not integrative with the retaining member yet when the messenger installed, took by mistake when having avoided the installation fixation clamp to lead to the two to mismatch to make things convenient for the temperature of indirect measurement cable, makied safeguard procedures, avoided the emergence of accident.