Because the market of Agricultural Products is not standardized, counterfeit agricultural products continuously appear, the establishment of traceability system for agricultural products has high significance to promote agricultural production and increase farmers' income. The traceability of agricultural products involves some aspects of the production, logistics, storage, wholesale and retail. How to coordinate each link is necessary condition to realize the traceability for agricultural products. In recent years, extensive attention has been paid to the Internet of Things which has practical application in industry informatization and urban safety defense. In this paper, the Internet of Things technology applied to the traceability system for agricultural products is discussed. Through the analysis of technology and network architecture of the Internet of Things, it shows the Internet of Things technology that facilitates information exchange among the links of the traceability system for agricultural products, and implements the traceability service for agricultural products. Finally, the application examples are given to show the application prospect of the Internet of Things in agricultural products field.