Abstract: In order to increase the discharge power of the triggered vacuum switch (TVS), meeting the demands for high-power switching devices in pulsed power systems, in this paper, relevant structural parameters affecting the output pulse current rise rate of the triggered vacuum switch are studied. First, combined with theoretical calculations, the effects of TVS structural inductance and arc resistance on the current rise rate are compared. Subsequently, a discharge test platform for TVS was built based on a detachable vacuum chamber. Effects of electrode structure, working voltage, and gap distance on the rising rate of pulse current are compared and analyzed. The results proved that differences in parameters such as electrode diameter, conductive rod size, and electrode material in TVS lead to the change of its structural inductance or arc resistance and affect the rising rate of pulse current. When using a flat plate electrode, the current rising rate of TVS is higher than that of the transverse magnetic fields electrode. By increasing operating voltage and decreasing gap distance, a steeper pulse current can be output by TVS, and the 10 mm TVS can output current with a rising rate of 1.91×10⁹ A/s under 10 kV operating voltage. It is suggested that, when developing TVS for high-power systems, the gap distance, structure and other parameters should be reasonably designed to improve the rise rate of switching output current.