The invention discloses an overhaul alarm device which comprises a central processing unit, an alarm module, a gyroscope module, a power module, a storage battery and a switch element. The gyroscope module is installed on a to-be-detected object and used for measuring the movement change information of the to-be-detected object. The central processing unit is connected with the alarm module and the gyroscope module and used for obtaining the movement change information, judging whether the movement change information exceeds a preset range or not, and controlling the alarm module to output an alarm signal if yes. The storage battery is connected to a power interface of the central processing unit through the power module and the switch element. The power module is used for converting the output voltage of the storage battery into the voltage required by work of the central processing unit when the switch element is switched on. The overhaul alarm device is beneficial for ensuring the personal safety of operating maintenance personnel and the safety of electrical equipment.