The invention relates to a distribution transformer grounding structure. The distribution transformer grounding structure includes a grounding plate and grounding posts, wherein the grounding posts are arranged on an extension line of the grounding plate; the grounding posts and the grounding plate are connected through a connecting wire; each grounding post includes a post body and a connecting piece; the connecting piece is provided with a connecting terminal and/or a connecting hole; and a fixed joint is arranged on the grounding plate. The distribution transformer grounding structure has the advantages that as the grounding posts are arranged on the extension line of the grounding plate, the grounding area of the grounding plate is effectively increased; as grounding resistance R = soil resistivity*conductor length/grounding area and the grounding resistor R is reduced correspondingly when the grounding area is increased and the soil resistivity and the conductor length are not changed, the grounding service life of a power distribution network is prolonged; and as each grounding post is formed by the post body and the connecting piece and is connected with the connecting wire through the connecting terminal and/or the connecting hole on/in the connecting piece, the grounding area of each grounding post is further improved and the grounding resistance is reduced.