At present, there are large quantities of heterogeneous agriculture database in the network. Agriculture information resources sharing are the tendency of modern agriculture development. Being aimed at the problem of “information island”, “duplication of similar projects” and urgent need for agriculture information resources sharing existing in agriculture database construction, the feature of XML’s suitable for information sharing is analyzed, some key techniques of information sharing are studied, and the implementation plan of agriculture information resources sharing system is provided based on XML in this paper. The system realizes the information sharing and integration of heterogeneous agriculture databases making full use of the advantages of the XML’s independence with platform, easy extension and may format. The system has good extendibility.