The invention provides a novel distribution line arc extinguishing lightning protection gap device comprising an insulator chain; a grounding side electrode is arranged above the insulator chain through an upper connecting armour clamp; a line side electrode is arranged below the insulator chain through a lower connecting armour clamp; a lightning protection gap is formed between the grounding side electrode and the line side electrode; the grounding side electrode is provided with an inductor; an arc extinguishing device is fixed on the lower connecting armour clamp, and comprises a base plate; a cylinder support is arranged on the base plate, and fixedly provided with an oblique insulation cylinder; a plurality of gas generators are arranged in the cylinder support; a gap is formed between the insulation cylinder bottom and the base plate top surface; the insulation cylinder side on the base plate is provided with a push device; the insulation cylinder outer side is also provided with a trigger mechanism. The novel distribution line arc extinguishing lightning protection gap device can set the plurality of gas generators in one time, and can ensure the gas generators to be stably triggered in order, thus improving the arc extinguishing lightning protection gap work stability, and reducing maintenance cost.