Vehicle-mounted electric compressor controller capacitor pre-charging device

The utility model belongs to the technical field of controller capacitor pre-charging, and particularly relates to a vehicle-mounted electric compressor controller capacitor pre-charging device which comprises an electric compressor body, the top of the electric compressor body is fixedly connected with a compressor cover plate, and a power line is led out of the electric compressor body and penetrates through the compressor cover plate. A plug is arranged at the tail end of the power line, two symmetrically-distributed threaded sleeves are fixedly connected to the interior of the compressor cover plate, a threaded rod is connected to the interior of each threaded sleeve through threads, and an annular groove is formed in each threaded rod. The two threaded rods in the threaded sleeve on the compressor cover plate are rotated, the threaded rods drive the connecting base to move, the connecting base drives the clamping plates to move, the two clamping plates move oppositely and make contact with the power line