Abstract: Parallel pulseforming lines are charged through the high voltage pulsetransformer. Each of these lines includes a magnetic switch acting as pulseforming switch. Adjusting the voltsecond characteristic of the magneticswitch, highvoltage synchronous multipulses are generated. The frequency change is under the control of the thyratron. The whole system is thus characterised with high repetition rate, high synchronous precision, high stabilization and credibility.