The invention relates to a pre-
ionization trigger rod and a gas switch employing the same. A pre-
ionization trigger needle and a high-
voltage isolation
resistor are integrally designed and are directly matched with a trigger
electrode to achieve the purposes of trigger simplification and compact structure. The structure of the pre-
ionization trigger rod comprises a
ceramic insulation tube, a trigger needle, a high-
voltage resistor and a
metal sleeve ring, wherein the trigger needle comprises a front-end
electrode, an intermediate needle rod and a rear-end needle tip, the intermediate needle rod of the trigger needle is inserted into a
ceramic insulation tube, one end of the
ceramic insulation tube is exposed out of the rear-end needle tip, the other end of the ceramic insulation tube is embedded into the front-end
electrode of the trigger needle, the
metal sleeve ring sleeves the outer surface of the ceramic insulation tube, the high-
voltage resistor is further arranged on the outer surface of the ceramic insulation tube, one end of the high-voltage resistor is connected with the front-end electrode, and the other end of the high-voltage resistor is connected with the
metal sleevering.