The system for the contracted management of rural lands is one of the basic systems of rural lands, and farmers and contracted land are the two major variables in the land contract relationship. It is one of the key technologies for the contracted management right of rural land ownership registration certification work to overcome the contradiction between the land centered data model in traditional land management and farmers, as the basic unit in the management of land contract relations. Thus, a complete and efficient data model was established to match the diversity of change of land contract relationship. For this issue, the present study established a spatial data model named, Active-Active mode of Contract farmer and Contracted land from two perspectives of farmers and contracted land. The elements in the contract relationship of geographic objects, events and states are integrated into the data model. A database system is developed based on this model, and the present took a variety of business events as an example, and verified the feasibility of the model.
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