The identification methods and research progress of molecular serotyping of Salmonella are reviewed. The related genes encoding three antigens （O， H and Vi） of Salmonella are introduced. The methods and research progress of molecular serotype identification of Salmonella with serotype specific marker genes as targets are described. This paper reviews the identification methods and research progress of Salmonella serotype， which lays a foundation for further identification of molecular serotype of Salmonella.