The invention discloses a
knowledge graph optimization method based on
large model and multi-
modal data fusion. The method comprises the following steps: S1, constructing a multi-
modal data set; s2, forming a preprocessed multi-
modal data set; s3, generating a unified
semantic vector representation; s4, inputting the unified
semantic vector representation into an adaptive Poisson
distribution model, performing dynamic modeling on the arrival rate and distribution characteristics of the multi-
modal data, and determining adaptive parameters of data sampling and updating; s5, generating a fused
semantic representation set; s6, performing entity extraction and relation identification by using the fused data representation, and constructing a preliminary
knowledge graph; and S7, carrying out automatic
verification, redundant information
elimination and structure adaptive adjustment on nodes, edges and attributes of the
knowledge graph to form an optimized knowledge graph. According to the method, the
data acquisition and atlas updating frequency can be adjusted according to the real-
time data semantic change, and it is ensured that the atlas construction process has semantic driving performance and
time sensitivity.