The invention discloses a pulse transformer type trigger and belongs to the technical field of gas switch triggering. The pulse transformer type trigger comprises a primary side driving part, a pulse transformer, a self-breakdown rapid charging and discharging Marx part and a blocking protection part, wherein the primary side driving part, the pulse transformer, the self-breakdown rapid charging and discharging Marx part and the blocking protection part are sequentially connected in series. Superposition of the amplitudes of the capacitance voltage of the primary side of the pulse transformer and steepening of the leading edge of the pulse transformer are achieved through the self-breakdown rapid charging and discharging Marx part. The polarities of the input voltage amplitude and the output voltage amplitude of the trigger, the parameters of the pulse transformer and the parameters of the self-breakdown rapid charging and discharging Marx part can be adjusted according to requirements. According to the trigger, the defects that according to a traditional Marx trigger, the multi-stage sphere gap shaking is serious, and the number of devices used in cooperation with the traditional Marx trigger is larger are overcome, and the defects in the aspects of insulation, leakage inductance and size of a traditional pulse transformer type trigger can be overcome.