Insulator power-on test device

The invention relates to the technical field of insulator testing, and provides an insulator power-on testing device which comprises a supporting frame, a connecting pipe, a high-voltage feeler lever and a mounting plate, the connecting pipe is arranged on the supporting frame, and the connecting pipe is arranged in a bent mode and forms at least one U-shaped cavity; the high-voltage feeler levers are connected with the connecting pipe, the high-voltage feeler levers are distributed at intervals in the bending direction of the connecting pipe and located on the same side, and contacts of the high-voltage feeler levers form a first plane. The high-voltage feeler levers are arranged on the supporting frame, the mounting plate is arranged on the supporting frame and located above the high-voltage feeler levers, the plane where the mounting plate is located is parallel to the first plane, a plurality of through holes are formed in the mounting plate, and contacts of the high-voltage feeler levers are located belo