The invention discloses a long document conflict comparison method based on a multi-
modal large model, and belongs to the technical field of
document processing. The method aims at solving the technical problems that existing document conflict comparison can only recognize literal conflicts in a shallow layer, an NLP small model is poor in long
text processing effect, and when a
large model processes a long document, the computing power cost is high,
semantics are prone to being lost, and compression is not thorough. According to the technical scheme, the method is characterized by comprising the steps of receiving, analyzing and converting a to-be-compared document and a
reference document into a standardized format, splicing a text to a cue word and performing Token
processing, executing three-level progressive dynamic compression if the text exceeds the limit, inputting the processed cue word into a multi-
modal large model, completing literal and
semantic layer conflict comparison by the model, and finally obtaining a comparison result. If the compression is invalid, executing a batch and document splitting bottom solving strategy, and finally formatting and outputting a comparison result.