Abstract: The eight species of wild rodents from Qinghai province and Xinjiang Uygur Autonomous Region were captured in this study. Their plasma proteins were analysed by polyacrylamide gel disc electrophoresis and the transferrin identification was made by utilizing specific staining of Nitroso R salt. Then the extent and feature of transferrin polymorphism were ascertained and the electrophoretic patterns of their plasma proteins were compared with each other. The results obtained are as follows:1.The transferrin polymorphism was observed only in the five species. The extent of polymorphism is up to 62.5%，There are 2 types of polymorphism in Ochofona curzoniae(Tongde population),Lagurus lagurus and Meriones crythrourus;3 types in Mus musculus and 4 types in Ochotona erythrotis.