The application discloses a kind of text context dynamic reconstruction methods, comprising: to original document is step length overlap segmentation
processing, generate semantic fragment and
record physical offset index information;Build document
context manager storage original document complete content;Perform vector retrieval and obtain the physical offset index of matching fragment;Real-time analysis and determine the physical position boundary of fragment in original document;From original document, real-time extraction predecessor and successor text block;Splice form complete logical
context window.The application establishes the accurate position
anchor point of semantic fragment and original document by physical offset index, realizes zero-cost
backtracking original;Adopt retrieval time dynamic reconstruction, support according to the context expansion range of adaptive adjustment of retrieval confidence;Provide three-level context mode to meet different retrieval scene demand;Intelligent deduplication eliminates redundant content.Compared with traditional RAG
system, retrieval accuracy is improved by about 18%, context completeness is improved by about 31%, and Token consumption is reduced by about 30%.