Abstract: The study of integration of multi-source heterogeneous planning data all have been the hotspot and difficulty in the field of spatial information technology the entire world.This paper analyzes the advantages and feasibility of using ontology technology under the ground of analyzing correlative integration technology，and confirms the features of planning ontology.This paper puts forward the framework of data integration based on ontology and implemented data integration using this framework.This paper carries through useful experiment from the point of theory and practice.