Prism measuring device special for precise triangulation height measurement

The utility model relates to a special prism measuring device for precise triangulation height measurement in the technical field of supports, which comprises a centering rod, a first conical part coaxial with the centering rod is arranged at the lower end of the centering rod, the lower end of the first conical part is a small end, and an upper horizontal plate and a lower horizontal plate are arranged on the centering rod at intervals in the axial direction of the centering rod. The upper plate surface of the lower horizontal plate is provided with a first mounting rod for mounting a prism, one plate surface of the upper horizontal plate is provided with a second mounting rod which is coaxial with the first mounting rod and is used for mounting the prism, and the other plate surface of the upper horizontal plate is provided with a threaded sleeve which is coaxial with the second mounting rod and is used for mounting a GNSS (Global Navigation Satellite System). According to the utility model, the centering r