Land surveying and mapping device

The invention discloses a land surveying and mapping device, and relates to the technical field of surveying and mapping. When dismounting is needed, a rotating shaft is rotated, the rotating shaft drives a gear piece to rotate, the gear piece is meshed with teeth fixed to the bottom of a tooth moving piece, the tooth moving piece is driven to horizontally move in a surveying and mapping machine fixing piece arranged on a lower fixing base body, and after the tooth moving piece moves by a certain distance, an inner moving piece moves; a fixed round rod at the front end of the inner moving part moves under the guiding action of an upper fixed block to extrude a spring sleeve, then a fixed limiting block on the inner moving part is in contact with a fixed limiting block on the surveying and mapping machine fixing part, the front end of the surveying and mapping machine fixing part is in contact with an inclined block, and the surveying and mapping machine fixing part is jacked up; the electronic module fixed on