Abstract: In view of the current problem of uninterrupted staring and defensive relying on the tactics of the sea of people, this paper develops a high-voltage cable anti-external breaking monitoring and early warning device based on the vibration optical fiber of the single defense area, using the mechanical vibration sensing capability of the distributed optical fiber vibration sensor, combined with information transmission and alarm technology, can effectively identify a variety of types of external breach risk sources, and push the alarm information to the external breach and defense personnel WeChat, turn the passive monitoring of the cable into active early warning, and effectively prevent external damage incidents. Improve power supply reliability.