Voltage reduction and rectification module for large power DC source

The utility model relates to the technical field of power supply modules and specifically to a voltage reduction and rectification module for a large power DC source. The voltage reduction and rectification module comprises a radiating fin, a rectification module, DC copper bars, an absorption capacitor, and a capacitance-resistance absorption and voltage reduction module, wherein the rectification module and the capacitance-resistance absorption and voltage reduction module are arranged on the upper end face of the radiating fin, the rectification module comprises unit diode modules arranged side by side, the unit diode modules are connected through the DC copper bars, connecting bolts are arranged on the DC copper bars corresponding to the unit diode modules, one terminal of the absorption capacitor is connected with the connecting bolts, the other terminal of the absorption capacitor is connected with wiring bolts on the unit diode module, and a transformer outputs a same tap while leading out two cables w