The utility model belongs to the oil field underground signal control technology, and adopts electronic components such as inductance coil. The utility model relates to a wake-up device of underground control system belonging to the layered water injection wells underground intelligent water regulator control system in the petroleum natural gas field. The device comprises an electric signal excitation unit, an electric signal control unit, a control circuit, a power supply, and a throwing body. An output end of the electric signal excitation unit is connected with an input end of the electric signal control unit, and an output end of the electric signal control unit is connected with the control circuit. The construction technology provided in the utility model is simple, thereby the incorrect localization of the underground cable caused by the bad well condition can be prevented, and the invalid control caused by the inaccurate wireless distance can be also prevented. By using the wake-up device of underground control system, the construction time and costs can be saved, the construction hidden trouble can be low, and the risks can be small, thereby the utility model provides a high efficiency, advanced wake-up method of underground control system having a high success rate.