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According to the relation of ontology context,considering different input schema,ontology graph is constructed in general environment.Based on ontology structure,the paper constructs multiple level graph representation with introducing similarity propagation of structural and instance level on context relation,and with rapid matching algorithm,a composite ontology mapping strategy is proposed,which iteratively achieves ontology mapping result with reused idea.Finally feasibility and effectiveness of the strategy is proved by complexity analysis to algorithm and some contrast test.