Abstract: High repetition rate, nanosecond pulse width fast pulsed power supply is a key technology to be overcome for particle accelerator fast kicker injection and ejection. In this paper, inductive adder topology, the RF MOSFET and its driver circuit were studied by computer simulation and table circuit experiment. On the basis of theory research, a ten-grade inductive adder pulsed power supply evaluating prototype was developed. The preliminary test of the prototype was completed. A ten-grade adder can produce a short pulse of pulse amplitude>4.3 kV, front edge<2.8 ns, and pulse width< 9 ns into 50 Ω at 500 Hz repetition rate.