Lightning protection grounding grid manufacturing method

The invention relates to a lightning protection grounding grid manufacturing method and a lightning protection grounding grid. The lightning protection grounding grid comprises grounding modules which are vertically inserted into soil, the grounding modules are arranged in parallel in the horizontal direction, welding lugs are arranged at the upper ends and the lower ends of the grounding modules respectively, horizontal grounding bars are welded to the welding lugs, and vertical grounding bars are welded to the upper end faces of the horizontal grounding bars; and the vertical grounding bar penetrates out of the soil and the hardened ground to the outside of the ground of the hardened ground, a tandem bar is welded on the vertical grounding bar at the outer end of the ground of the hardened ground, and the tandem bar is connected with a down lead and a machine room grounding wire. The manufacturing method of the lightning protection grounding grid is simple in construction and ensures that the grounding stan