The present application relates to the technical field of relation extraction, in particular to an
invoice relation extraction method based on
natural language analysis, comprising the following steps: through analyzing multiple features such as image seal, two-dimensional code and handwritten notes, matching text and image space information, checking the consistency of two-dimensional code and tax control code, identifying field combination and amount and payee
abnormality. In the present application, through multi-
level fusion analysis of seal, two-dimensional code and handwritten marks and other detail features in the
invoice image, spatial joint discrimination of image and text content is realized, the credibility of information
verification is improved by using character security comparison and coding consistency, with the help of context
semantic dependency structure, the deep connection between
payment behavior and entities is strengthened, elements such as amount and payee are dynamically classified and aggregated, automatic recognition of complex transaction relations is realized, further through linkage clustering and difference tracking, intelligent judgment and real-time
label generation of abnormal
risk behavior are realized, and the active
risk control ability of financial management is improved.