The invention discloses a connective bridging slab structure comprising a bridge abutment and a butt slab, wherein one end of the butt slab is fixedly anchored with the bridge abutment through steel bars extending outside the bridge abutment top, and the other end is jointed on the roadbed. The invention also discloses a connective bridging slab structure construction method comprising the following steps: 1, determining the areas of the steel bars extending outside the bridge abutment top: assuming the butt slab is rigid and the most outside steel bars extending outside the bridge abutment top reach yielding, actual measuring modulus deformation of the compressed roadbed soil body, determining the soil body maximum strain, and obtaining the areas of the steel bars extending outside the bridge abutment top through moment balance and obtaining the bridge abutment top distribution areas; 3, casting the bridge abutment and the butt slab, and connecting the butt slab with the bridge abutment: casting the bridge abutment, placing a butt slab steel bar net frame on the bridge abutment top when the bridge abutment concrete reaches the required intensity, welding or binding the steel bars extending outside the bridge abutment top with the butt slab steel bar net frame, fixing the butt slab steel bar net frame on the bridge abutment top, connecting the butt slab with the bridge abutment top, and casting butt slab concrete.