The present invention provides a plaiting method of town digital doorplate, including following steps: finding geographic center of town combined with the map, and determining the coordinate (50000,50000), establishing plane rectangular coordinates system centered on the coordinate, planed on the whole town, in terms of m, the point coordinates of each point in the coordinates system is (xi, yi), wherein xi and yi are 5 arabic numeralses; plaiting and setting road plate: determining points coordinates (xi, yi) of start, end and crotch combined with the map, xi+yi is the position code of each road plate; plaiting and setting doorplate: determining the points coordinates (xi, yi) of each buildings of above each road, xi+yi is the position code of the doorplate. The invention has a simple plaiting process, convenient use, practical use, and accurate, only positioning, having navigation lead function in its true sense, capable of completely resolving problems of difficult pathfinding, asking for directions.