Abstract: According to the principle of computer interlocking station interlocking table compilation, using the method of drawing exchange format (DXF) data extraction, combining with the layout plan of station signal and other station data, this paper constructed the station shape data structure, and through the breadth first search algorithm, implemented the route automatic search, and saved the route data and interlocking table data. The paper used ActiveX technology to connect with AutoCAD software, according to the saved interlocking table data, generated and output the interlocking table in CAD format. The software has been used in the field and achieved good results.