Novel surveying and mapping instrument with high-precision positioning function

The utility model relates to a novel surveying instrument with high-precision positioning, which comprises a positioning disc, an instrument rack and adjustable support legs, the instrument rack comprises a stabilizing disc, a rotating disc and a positioning central shaft, the positioning disc and the instrument rack are detachably mounted in a threaded manner, and the adjustable support legs are arranged on the positioning disc. When the instrument rack is used for surveying and mapping, the adjusting knob is rotated so that the adjusting knob can conduct transmission force application on the tooth grooves in the side face of the disc body through the gear ring, rotation of the rotating disc is achieved, and rotation adjustment needed when the positioning disc is used for daily surveying and mapping is met; when the instrument rack is placed on a hollow uneven plane, stable supporting placement is provided for the positioning disc, the instrument rack is compact and practical in structure, the size and the w