The utility model discloses a table leg type grounding grid. The device comprises a horizontal grounding grid and a table leg type grounding device, corners of the horizontal grounding grid are arc-shaped. Wherein the horizontal grounding grid is connected with electrical equipment, the table leg type grounding device comprises grounding electrodes and an L-shaped horizontal grounding electrode, the horizontal grounding electrode is laid at the bottom of the enclosing wall foundation and is consistent with the excavation depth of the enclosing wall, the two ends of the horizontal grounding electrode are fixedly connected with the two grounding electrodes respectively, and the top ends of the grounding electrodes are connected with the corners of the horizontal grounding grid. According tothe utility model, the contact potential and the step potential of the transformer substation can be greatly reduced, the construction is convenient, the unnecessary investment is reduced, the practicability is strong, and the generated economic benefit and social benefit are very remarkable.