Abstract: This paper designs a single source pulse generator based on the pulse transformer. The generator uses a set of pulse discharge capacitors, a thyristor as a discharge switch, a pulse transformer as a transmission line with single primary winding and double secondary windings. The pulse source outputs a high voltage when the transformer is operating in boost mode, and outputs large current in the buck mode. The load is in a high-impedance state before breakdown and in a low impedance state after breakdown. Based on the above transformer characteristics and the actual conditions, the design uses the one-way conduction characteristics of the diode to realize the switching of the operating mode of the transformer. Then, the pulse source can output high voltage and large current pulse time-sharing. The design isolates the high-voltage output circuit and the low-voltage control circuit using the transformer. Compared with the general dual power supply, the pulse power supply decreases the cost of the driving circuit, reduces the size of the device, and facilitates the miniaturization and compactness of the device. The results show that a 18 μF primary storage capacitor of 700 V can output an open circuit voltage of 7.6 kV and a rising edge of 432 ns, and a short current of 690 A, the full-width of 15.6 μs and the front of 7.0 μs. It meets the trigger requirements of ignition tube NL37248.