The invention relates to a cable damage prevention early warning method based on wake-up detection, and the method comprises the steps: S1, carrying out hardware detection on a preset cable anti-damage detection device which comprises a gyroscope sensor module, a wireless communication module, a main control module and a power supply; S2, collecting vibration data of the cable through a gyroscopesensor module; S3, judging whether the cable vibration data reaches a preset early warning condition or not, if not, executing the step S4 after the step S2 is executed for the first time, and if yes,continuing to execute the step S2 until the second time is reached, and if the cable vibration data reaches the early warning condition again, giving an alarm to the background server, otherwise, executing the step S4; S4, controlling a main control module to enter a sleep mode; and S5, starting or awakening the main control module at intervals of third time, and sequentially executing the stepsS1 to S4. Compared with the prior art, an alarm can be given automatically when there is construction near the cable, and the method has the advantages of low power consumption and false alarm prevention.