Due to its superiorities of high exhaust speed, wide frequency band and rapid response, the plasma synthetic jet actuator has shown wide and promising application prospects in high-speed flow control. On account of the weak control authority and small affected area of single actuator, a parallel actuator array was investigated. A parallel microsecond-grade pulse power supply was developed to achieve a three-path discharge. The power supply shows good stability with and without the load at 1000 Hz working frequency. As the capacitor increases, the temperature of the plasma arc increases. The air in the actuator chamber is heated more prominently. So the speed of the jet rises. As the frequency increases, the jet speed decreases due to a lower breakdown voltage. The parallel actuators can be controlled independently by manipulating the trigger signals, which makes the parallel actuators more flexible than the serial actuators. The phase of the actuator was shown to be controlled accurately by the trigger signal.