The system is suitable for optical fiber detection of railway through lines

The embodiment of the utility model provides an optical fiber detection system suitable for a railway through line, and the system enables a temperature sensing optical fiber to be closer to a conductor through the compounding of the temperature sensing optical fiber in a cable or an overhead line, thereby achieving the accurate monitoring of the temperature of the conductor without being affectedby external environment factors. Using fiber optic sensing techniques, an existing railway SCADA system is combined; a railway electric power through line optical fiber temperature measurement protection system is established. The operation temperature of a full-interval cable or overhead line conductor is monitored in real time so as to judge the operation state of the cable or overhead line, and by monitoring the temperature change of any point of the through line in real time, early warning can be performed in advance when the cable is damaged and overhead line single-phase nonmetal grounding heating occurs so as