The anchor damage experiment of the submarine power cable in running is conducted in order to detect anchor damage fault using distributed optical fiber vibration sensing technology.The anchor smash and drag events are simulated using a cargo ship of 550 tons and an anchor of 1 000 kg.The 3-core optical fiber composed of submarine power cable is first monitored using distributed optical fiber vibration sensing equipment based on Ф-OTDR.The optical fiber vibration data is obtained under calm sea

anchor smash and anchor drag.The data is then analyzed in energy and FFT domain corresponding to time and space.Results indicate that the amplitude of energy spectrum and amplitude spectrum are small when the sea is calm.Anchor smash can cause a short-time energy and the amplitude increasing with abundant frequency components.Anchor drag can cause a longertime energy and amplitude increasing with less frequency components.Anchor damage fault can be detected effectively with the distributed optical fiber vibration sensing technology.