Abstract: This thesis was based on the re-development of AutoCAD via VBA, studied on the coordinate calculation method of turnout and the turnout curve. Visual interface was designed to achieve automatic configuration of different types of turnouts. When the center position of the fork was under the conditions, it could be ensured the accurate calculation of the various parts depending on the type of the turnout and other factors, especially the turnout bifurcated incidental information and position of the curve plotted turnout layout.