Abstract: The design scheme of a trigger generator applied to multiple spark gaps based on Tesla pulse transformer was proposed. The voltage distribution characteristics of multiple spark gaps under DC and pulse voltage were introduced, and the main influence factors of the voltage distribution under pulse voltage were given. By using a simulation software, the influences of the trigger frequency, dividing capacitor and equalizing resistor on the voltage distribution were analyzed and the optimal parameter setting of the trigger network was obtained. Take 10 spark gaps for example, the key parameters of Tesla transformer were determined based on the three elements of pulse steepness, output amplitude and loading capacity. When the coupling coefficient of Tesla pulse transformer was 0.7, the primary inductance was 2500 nH, the secondary inductance was 400 mH，the primary capacitor was 60 F and the charging voltage of the primary capacitance was 2.0 kV, the trigger voltage could achieve a trigger of ten-series spark gap. Combined with the multiple spark gap experiment, the work process of the Tesla pulse transformer applied to multiple spark gaps was investigated.