The utility model discloses a bridge deck structure on a bridge beam slab gap. The bridge deck structure on the bridge beam slab gap comprises two adjacent bridge beam slabs. The gap is arranged between the two adjacent bridge beam slabs, an elastic concrete layer is arranged above the gap, bridge deck concrete layers are arranged on the two sides of the elastic concrete layer, and a bridge deck layer is arranged on the elastic concrete layer and the bridge deck concrete layers. The elastic concrete layer is composed of a first elastic concrete block and a second elastic concrete block, a first thin extension segment with the upper end face flush with the upper end face of the first elastic concrete block is arranged on the right side of the first elastic concrete block, a second thin extension segment with the lower end face flush with the lower end face of the second elastic concrete block is arranged on the left side of the second elastic concrete block, the first thin extension segment is located on the second thin extension segment, an interspace is formed between the first thin extension segment and the second elastic concrete block, an interspace is formed between the second thin extension segment and the first elastic concrete block, and filler blocks are arranged in the interspaces. The bridge deck structure on the bridge beam slab gap has the advantages that the elastic concrete layer has high elastic deformation capacity, elastic deformation required by the ends of the beam slabs which are repeatedly disturbed by loads of vehicles can be provided, and the service life is effectively prolonged.