Surveying instrument positioning device for engineering surveying and mapping

The invention relates to the technical field of engineering surveying and mapping, in particular to a surveying instrument positioning device for engineering surveying and mapping. Comprising a fixing table and a plurality of supporting frames with one ends hinged to the fixing table, telescopic rods are arranged in the supporting frames, positioning structures are installed at the lower ends of the telescopic rods and comprise positioning plates rotationally installed at the bottoms of the telescopic rods, fixing cylinders are rotationally connected into the positioning plates, and inserting fixing plates are slidably connected into the fixing cylinders; an extension spring is installed between the insertion fixing plate and the fixing cylinder, a pedal is fixedly connected to the side, away from the telescopic rod, of the insertion fixing plate, a limiting structure used for limiting the position of the insertion fixing plate is arranged on the insertion fixing plate, and a cleaning device used for cleaning