Knowledge graph-based semantic retrieval method and device, equipment and storage medium

The invention discloses a semantic retrieval method and device based on a knowledge graph, equipment and a storage medium, and belongs to the technical field of natural language processing. The method comprises the following steps: preprocessing a natural language retrieval statement input by a user to obtain a plurality of phrases; determining a named entity type corresponding to each word group according to the semantic similarity between a first semantic representation vector corresponding to each word group in the plurality of word groups and a second semantic representation vector corresponding to a category label with a named entity type label; according to the named entity type and the query statement template corresponding to each phrase, assembling the plurality of phrases to obtain a first query statement; and determining triple data matched with the first query statement in the target knowledge graph, and constructing and displaying a knowledge graph query result corresponding to the natural langua