The invention discloses a high frequency pulse power supply device. The device comprises a rectification filter circuit, a current superposed circuit, a constant current output circuit; the constant current output circuit outputs a value-adjustable constant current Ia; the current superposed circuit outputs an amplitudes adjustable and positive-negative symmetrical pulse current; the amplitude of the pulse current is IL; the currents outputted by the two circuits are superposed onto a load; when a power switch tube (T5) is switched on and a power switch tube (T6) is switched off, the output pulse current peak value Ip=Ia + IL; when the power switch tube (T6) is switched on and the power switch tube (T5) is switched off, the output pulse current basic value Ib=Ia - IL; the output current of the constant current output circuit is an adjustable constant current; and the output current of the current superposed circuit is a positive-negative amplitudes symmetrical square wave current. When the basic value and the peak value of the pulse current are mutually transformed, a high voltage arc-stabilizing circuit outputs a voltage in the same current direction with that of the transformed current, thus the electric arc is maintained stably.