The invention discloses a protection test alerter which comprises a vertical support, and an alerter body arranged on the middle portion of the support. The alerter body comprises an indication module, a sensor, a control module, an alarming module and a power module. The indication module, the sensor, the control module and the alarming module are respectively connected with the power module. The indication module, the sensor and the alarming module are respectively connected with the control module. The protection test alerter can replace manpower to play a warning role in the work of protection tests, and the problems that manual warning wastes labor, warning neglect exists, and warning effects are poor are solved; meanwhile, the protection alerter is turned on or off by a tester according to work needs, and the problems of coordination of manual guarding can be effectively solved.