Urban three-dimensional terrain auxiliary surveying and mapping device

The utility model relates to the field of terrain auxiliary surveying and mapping, and discloses an urban three-dimensional terrain auxiliary surveying and mapping device which comprises a placing plate, a fixing plate is arranged on the upper surface of the placing plate, a threaded rod is arranged on the fixing plate, a driving block is arranged at the tail end of the threaded rod, and a limiting guide rail is arranged on the upper surface of the placing plate. A connecting groove is formed in the outer surface of the limiting guide rail, a movable clamping plate is arranged on the outer surface of the threaded rod, fixed extrusion blocks are arranged on the inner surface of the movable clamping plate, a surveying and mapping machine is arranged between the fixed extrusion blocks, fixed supports are arranged on the bottom surface of the placing plate, and a first connecting shaft is connected between the fixed supports. According to the surveying and mapping machine fixing device, the fixing plate is arrang