Legal document key information extraction method and system

The embodiment of the invention provides a legal instrument key information extraction method and system, and the method comprises the steps: dividing a legal instrument into a plurality of semantic blocks according to the grammar and semantic features of the legal instrument; constructing a dictionary library related to the legal field, wherein the dictionary library comprises a plurality of keywords; respectively generating a semantic vector corresponding to each semantic block and a semantic vector of each keyword; selecting at least one target statement block from the plurality of semantic blocks according to the semantic vector corresponding to each semantic block and the semantic vector of each keyword; selecting a key sentence from the at least one target sentence block, and performing reconstruction operation on the selected key sentence to generate key information; and filling a preset information template with the key information to generate structured key information. By adopting the technical sche