Abstract:In order to achieve the automatic identification of data exchange mapping between the local ontology, the research focuses on the automatic identification technique of data exchange mapping based on the global ontology and local ontologies mapping, the technique reuse the ontology mapping, combined with the study of information integration data exchange mapping analyzes the detailed breakdown of ontology mapping and reversible ,defined ontology mapping transitivity and the identify miss rate,study the mapping combined results achieve automatic identification. The technical has been applied well in large-scale data exchange project of Daqing Oil field data centers.