The invention relates to a parallel connection gap device used for glass insulator thunder and lightning protection. The parallel connection gap device includes an upper end gap electrode fixedly arranged on the upper end of a glass insulator string; a lower end gap electrode fixedly arranged on the lower end of the glass insulator string; and a voltage sharing electrode of the glass insulator string connected between the upper end gap electrode and the lower end gap electrode. The technical scheme can reduce situations that power-frequency follow current arcs run towards the insulator surface, improves the success rate of dredging arcs, and improves an effect of protecting the insulator string.