Moisture-proof device, moisture-proof method and application in outdoor current transformer

The invention belongs to the technical field of current transformers, and discloses a moisture-proof device, a moisture-proof method and application in an outdoor current transformer, the moisture-proof device comprises a threading assembly, one end of the threading assembly is provided with a connecting assembly, and one end, away from the threading assembly, of the connecting assembly is connected with a wiring assembly; one side of the threading assembly is communicated with a communicating pipe, one end, far away from the threading assembly, of the communicating pipe is connected with a breathing device, and the arranged sampling assembly and the breathing device are matched with each other, so that wet gas in the current transformer is detected, regulated and controlled; the screening part and the rotating screen are subjected to hierarchical control according to the identification result of the visual window so as to ensure that the interior of the current transformer is always in a dry state, and meanw