Document analysis method and system based on large model

The invention discloses a document analysis method and system based on a large model, belongs to the technical field of artificial intelligence, and aims to solve the technical problems of context understanding limitation and insufficient information retrieval accuracy existing when a dialogue system processes complex and knowledge-driven dialogue tasks. Comprising the following steps: document loading: preprocessing a document; fragmenting the document: segmenting the document; document summary generation: performing summary generation on the document fragments based on the model, and combining the summary fragments corresponding to all the document fragments into a document summary through the large model; text vectorization: carrying out vector representation on contents in the document fragments and the document summary through an embedded model; question matching: calculating the similarity between the question and the document fragment and the similarity between the question and the document summary, an