Abstract: The solid-state high-voltage pulse switch with high index, compact structure and good stability is of great significance to the progress of pulse power technology. This paper proposes a high-voltage nanosecond switching technology route based on Photoconductive Semiconductor Switches (PCSS) and thyristor surge suppressor (TSS) arrays, and a new type of high voltage switching module (PCSS triggering thyristor surge suppressors module, PTTSSM) is developed by using PCSS, which is convenient for realizing the high-voltage isolation, as the triggering unit of TSS arrays. The 20 kV PTTSSM has a peak output current of 23.7 A, a pulse width of 122.1 ns, a rise time and a fall time of 55.9 ns and 128.3 ns, respectively, and a size of 60 mm×60 mm×40 mm. The 100 kV PTTSSM has an adjustable peak output voltage of 60−100 kV, a maximum peak output current of 356 A, a pulse width of 1.308 µs, rise time and fall time of 160.4 ns and 2.454 µs, respectively, and its size is 150 mm×100 mm×50 mm. All of them can work stably for a long time. Pulse power supply based on a new solid-state switching module successfully generates a large number of stable low-temperature plasmas in organic wastewater treatment experiments, verifying the feasibility and effectiveness of the switching module-driven plasma generation.