Complex equipment knowledge graph cold start method based on relation model conversion

The invention discloses a complex equipment knowledge graph cold start method based on relation model conversion. The method comprises the steps of providing a complex equipment knowledge ontology integrity constraint model according to characteristics of complex equipment knowledge; on the basis, an algorithm for mapping data tables in the relation model and relation between the data tables to a knowledge graph ontology element concept, an instance concept, attributes and a relation is constructed; and establishing an entity triple and relation triple data extraction and conversion algorithm based on ontology analysis and relation model primary and foreign key calculation, and realizing knowledge data classification, mapping and storage. According to the process and the method, the relation model is established to map to the complex equipment knowledge graph model body layer and the data layer, the target of collecting the structured knowledge cold start domain knowledge graph in the relation database is ach