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Geospatial framework is the foundation of digital nation, digital province and digital city. Common platform of geographic information that belongs to geospatial framework can provide online services that include geo-information services and function services for the governments, industry, public and so on. A data-sharing model in the common platform of geographic information is studied and put forward in the paper. The data model architecture in the common platform is mainly compose of the entity-oriented vector data model in the three-dimensional space, the layer and tile pyramid grid data, the relationship table or WORD files and so on. The data model was realized in C/C++ development environment in Windows XP.
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