Carrier type underground power supply device

The invention provides a carrier type underground power supply device. The device comprises a ground power supply unit and an underground power supply unit, and the ground power supply unit comprisesa high-frequency power supply module; the underground power supply unit comprises a first filtering module, an AC-DC rectification module and a DC-DC power supply module; the ground power supply unitsends high-frequency alternating current through the high-frequency power supply module; the high-frequency alternating current is coupled to the cable, and the high-frequency alternating current andthe low-frequency alternating current sent by the frequency converter power supply are transmitted to the underground power supply unit through the cable; the first filtering module filters out low-frequency alternating current in the cable and outputs high-frequency alternating current to the AC-DC rectifying module; the AC-DC rectification module converts the high-frequency alternating current into high-voltage direct cur