The invention discloses a knowledge graph editing method based on a multi-dimensional space, and the method comprises the following steps: knowledge graph construction: generating a knowledge concept-level architecture through an ER graph, extracting concept elements, and generating a corresponding relation among an ontology, an entity and an instance; storage of the knowledge graph: storing the constructed knowledge graph; and application of the knowledge graph: editing and applying the stored knowledge graph. The method has the advantages that knowledge is displayed in a layered mode, the relation among the ontology, the entities and the instances is accurately described, when other systems construct the knowledge base based on the map, the ontology, the entities and the instances of theknowledge can be displayed, and a user can obtain related information of knowledge points more comprehensively. By additionally arranging the extension module, the attributes of the body, the entityand the instance can be extended, and data redundancy is reduced.