Abstract: It is a new way to obtain nanosecond high voltage pulse by employing inductive pulse forming line and voltage adder technology. In this paper, the basic principle of the generator is described, and two kinds of prototype pulse generators (single line and double line types) are fabricated by using coaxial cable and MOSFET switch to demonstrate this idea. The preliminary experiments, in the case of four module superposition, have achieved nanosecond short pulses (4 kV/20 A, 20 ns and 2 kV/20 A, 20 ns, respectively).