The invention belongs to the field of electric power safety, and particularly relates to a ground wire electrification detection and alarm method. The method comprises the following steps: detecting adevice to be tested by an electric field sensor, and meanwhile, transmitting, by the electric field sensor, a detection result to a server center; if the device to be tested is not electrified, directly performing a follow-up operation; if the device to be tested is electrified, sending, by an audible and visual alarm of the electric field sensor, alarm information, and sending alarm status information to a mobile terminal of an administrator, until the device to be tested is not electrified, and then performing the follow-up operation; and when the device to be tested is not electrified, dismounting and/or mounting a ground wire through a wiring rod, sensing, by the electric field sensor, the wiring rod, and transmitting the information of the wiring rod to the server center. By adoptingthe alarm method provided by the invention, whether the device to be tested is electrified can be detected in real time, and the detection result is synchronously recorded and stored, thereby avoiding the occurrence of safety accidents.