Construction method for mixed map for navigation of mobile robots

The invention relates to a construction method for a mixed map for the navigation of mobile robots. A whole area is divided into a plurality of local areas, and each local area has an overlapping area with one or more adjacent local areas thereof, visual marks are added in each overlapping area, the mobile robots respectively move in each local area and acquire data of all points in each local area; an occupied grid map principle is employed to have acquired data in each local area generate corresponding local measuring maps; a note is added on each local measuring map, the note comprises a switch node, and the switch nodes correspond to the visual marks of the overlapping areas; and same switch nodes of different local measuring maps are connected, and the topology structure of whole area is formed. According to the method, the reliability of the mixed map can be realized, management and maintenance of the maps can be facilitated, the adaptability and expansibility are realized, and reliable navigation information can be provided for the mobile robots.