The invention belongs to the technical field of pulse power, and particularly relates to an array micro-hollow cathode discharge-triggered gas switch. The switch structure mainly comprises an external insulating cylinder, main electrodes, array micro-hollow cathode discharge generators, pneumatic connectors, connecting and reinforcing parts and the like. As a trigger of the gas switch, the array micro-hollow cathode discharge generator is of an anode-medium layer-cathode structure, and a plurality of micropore arrays are perforated on the array micro-hollow cathode discharge generator by laser. The generator carries out micro-hollow cathode discharge under the action of pulsed voltage, and by utilizing a large area of high-density electrons as initial induction electrons produced by array discharge, the breakdown conduction of the gas switch is realized ultimately. Because the trigger is implemented by adopting microplasma discharge, compared with the triggering mechanism of conventional three-electrode field distortion and multi-pole multi-channel switches, the gas switch requires low triggering voltage and little energy for triggering, which is favorable for the miniaturization of switch-triggered power supplies; moreover, multi-trigger multi-point synchronous triggering can realize the multi-channel breakdown conduction of the switch and decrease the conduction inductance of the gas switch.