The invention discloses a three-dimensional fiber gird bar reinforced concrete structural part, which comprises concrete and fiber grid bars, wherein the fiber grid bars are arranged in the concrete and fall into double layers or multiple layers; every two adjacent layers of the fiber grid bars are connected through connecting rods; and the connecting direction is the vertical direction or the inclined direction. The three-dimensional fiber gird bar reinforced concrete structural part has the advantages that one three-dimensional fiber grid bar is added in the concrete structural part, so the tensile strength, the bending strength, the toughness and the crack-resistant performance of the concrete structural part can be improved; the weight can also be reduced; corrosion resistance and electromagnetic interference prevention are achieved; and the three-dimensional fiber gird bar reinforced concrete structural part is applicable to the fields of bridges, pavements, buildings and the like.