A power converting device for a hybrid, comprising: a first accumulating unit disposed between a first inverter connected to an engine auxiliary motor and a second inverter connected to a load motor , and accumulating electric energy generated by the engine auxiliary motor; a second accumulating unit configured to accumulate the electric energy accumulated by the first accumulating unit, the electric energy generated by the engine auxiliary motor, and electric energy generated through a generating operation of the load motor; an initial charging unit comprising a DC-DC converter and an inductor disposed between the first accumulating unit and the second accumulating unit , and configured to charge the electric energy accumulated in the first accumulating unit to the second accumulating unit ; a switching unit configured to switch a connection between the initial charging unit and the second accumulating unit , and a connection between the second accumulating unit and the first accumulating unit , respectively; and an initial charging control unit configured to match first accumulated voltage sensed at the first accumulating unit and second accumulated voltage sensed at the second accumulating unit , respectively, to each other during initial ignition, by controlling the switching unit to connect the first accumulation unit and the second accumulating unit ; wherein the switching unit comprises: a first switching unit configured to switch the connection between the initial charging unit and the second accumulating unit to charge the second accumulating unit ; and a second switching unit configured to switch the connection between the second accumulating unit and the first accumulating unit to drive the load motor . a first accumulating unit disposed between a first inverter connected to an engine auxiliary motor and a second inverter connected to a load motor , and accumulating electric energy generated by the engine auxiliary motor; a second accumulating unit configured to accumulate the electric energy accumulated by the first accumulating unit, the electric energy generated by the engine auxiliary motor, and electric energy generated through a generating operation of the load motor; an initial charging unit comprising a DC-DC converter and an inductor disposed between the first accumulating unit and the second accumulating unit , and configured to charge the electric energy accumulated in the first accumulating unit to the second accumulating unit ; a switching unit configured to switch a connection between the initial charging unit and the second accumulating unit , and a connection between the second accumulating unit and the first accumulating unit , respectively; and an initial charging control unit configured to match first accumulated voltage sensed at the first accumulating unit and second accumulated voltage sensed at the second accumulating unit , respectively, to each other during initial ignition, by controlling the switching unit to connect the first accumulation unit and the second accumulating unit ; wherein the switching unit comprises: a first switching unit configured to switch the connection between the initial charging unit and the second accumulating unit to charge the second accumulating unit ; and a second switching unit configured to switch the connection between the second accumulating unit and the first accumulating unit to drive the load motor . a first switching unit configured to switch the connection between the initial charging unit and the second accumulating unit to charge the second accumulating unit ; and a second switching unit configured to switch the connection between the second accumulating unit and the first accumulating unit to drive the load motor . <EOS>