Early-warning device for preventing excavation misoperation of buried cable

The invention relates to an early-warning device for preventing excavation misoperation of a buried cable. The device comprises an optical fiber vibration sensor with a mode identification function, a signal processing unit, a wireless communication unit and a power supply unit. The signal processing unit is connected to the optical fiber vibration sensor, the wireless communication unit and the power supply unit. The optical fiber vibration sensor is installed in a set range of a cable and is used for monitoring a vibration signal around the cable in real time and timely emits an alarm in case of behaviors which may endanger the cable, and accidents of power transmission and transformation are reduced. Compared with the prior art, the device has the advantages of low false alarms, fast reaction and an accurate positioning interval.