Protective device for high-voltage line parameter test

The utility model provides a protective device for testing parameters of a high-voltage line. The protective device comprises a protective box body, a plurality of plug-in assemblies, a current detector, a controller and a driving assembly, a partition plate is arranged in the protective box body; the plug-in assembly is provided with a first wiring end and a second wiring end, the second wiring end is electrically connected with a variable conductive core, and the variable conductive core has a conductive position in which the variable conductive core upwards extends out of the second wiring end and is conducted with the first wiring end, and also has a power-off position in which the variable conductive core downwards retracts into the second wiring end to be separated from the first wiring end; the current detector is used for detecting a current signal of the grounding line; the controller is in wireless communication connection with the current detector and the parameter tester; the controller is used fo