The invention discloses a constant-thickness ultrathin steel-concrete combined bridge deck structure with holed T-shaped reinforced ribs. The constant-thickness ultrathin steel-concrete combined bridge deck structure has the characteristics of both high bearing capacity and light self weight, the structure measures at the position connecting with a main beam can be effectively simplified, and the difficulty of a steel structure manufacturing and welding technology and the construction difficulty of a bridge deck are reduced. The constant-thickness ultrathin steel-concrete combined bridge deck structure comprises at least two combined bridge deck units forming splicing on the main beam, each combined bridge deck unit comprises a bottom steel plate and a cast-in-place concrete plate poured thereon, as well as a shear connector for connecting the bottom steel plate with the cast-in-place concrete plate as a whole, the combined bridge deck structure is characterized in that the shear connector comprises a steel reinforcement shear connector embedded to the cast-in-place concrete plate, and holed T-shaped reinforced ribs which are horizontally arranged on a bottom steel plate at intervals and extend longitudinally; the section of each holed T-shaped reinforced rib is T-shaped, through holes arranged at longitudinal intervals are formed in the surface of a vertical plate, and the lower end of the vertical plate surface is connected with the surface of the bottom steel plate in a welding manner; and the surface of the bottom steel plate is lapped-welded together with the surface of a flat and straight top plate of the main beam, the cast-in-place concrete plate is formed by overall pouring, and the sections of the cast-in-place plate have equal thickness.