The new high voltage pulse generator is mainly composed of condense capacitors, hydrogen thyratron, high voltage transformer and voltage adapter. The total capacitance and charged voltage of the condense capacitors can be changed and controlled. The output pulse of the generator has an exponential waveform, and its rising time is 0.4~0.6μs. By adjusting the capacitors and its charged voltage, the pulse width varies from 1.5μs to 4.0μs, and the pulse amplitude varies from 10 kV to 200kV.