Railway yard line structure data extraction method and system

The invention provides a railway yard line structure data extraction method and system, and relates to the technical field of constructional engineering digitization, and the method comprises the steps: obtaining line image information and line BIM model information of all to-be-examined railway yard lines; processing the line image information based on first-order logic; performing calculation semantic expression processing based on the line BIM model information and the feature description information of the structure information of the line to obtain calculation semantic expression information of the line structure; generating undirected graph information from the calculation semantic expression information of the line structure, and performing structure analysis processing on the undirected graph information to obtain class tree structure information corresponding to the line structure; and performing line structure data extraction on the class tree structure information corresponding to the line structur