Abstract: The orthotropic steel bridge deck is composed of welded components such as cover plates, longitudinal ribs,and transverse diaphragms. Due to its complex structure and numerous spatial welds, the welding residual stress and deformation distribution of the steel bridge deck during the welding process are very complex, which reduces the dimensional accuracy and fatigue durability of the structure. Taking the rib-deck-floor beam welded joint（rib-deck-floor beam, referred to as RDF joint） in the steel bridge deck as the research object, thermoelastoflastic finite element analysis was conducted to obtain the inherent strain near the welds. The inherent strain was then applied as an initial load to the corresponding weld seam of the steel bridge deck. The self-developed welding deformation simulation software Perfect-Welding was used to calculate the overall welding deformation of the steel bridge deck, and the distribution of welding deformation under different welding sequences was analyzed. The research results indicate that the welding deformation distribution of the steel bridge deck is uneven, and the maximum transverse deformation occurs at the free edge of the cover plate between the two transverse partitions. The longitudinal shrinkage deformation is more obvious at both ends of the steel bridge deck, and gradually decreases near the middle of the structure, and the overall longitudinal deformation is smaller than the transverse deformation. Different welding sequences have a certain impact on welding deformation, and the reasonable planning of welding sequences can effectively control the welding deformations of steel bridge decks.