Abstract: A method and system for product knowledge fusion are discloses. The method includes following steps: acquiring original data of a product; performing knowledge extraction on the original data of the product to obtain entities, attributes and semantic relationships related to the product; building an entity information knowledge base according to the entities, attributes and semantic relationships related to the products; fusing the semantic relationships and attributes with the entities and matching the entities by adopting a text matching model to obtain original data of the product corresponding to matched entity information; and establishing a knowledge graph of the product according to the matched entity information. The method and system standardize multi-source heterogeneous data with a knowledge fusion method, thus effectively reducing polysemy and unclear references of knowledge caused by different data structures and sources.