Positioning device and positioning system for correcting position of glass substrate

The utility model discloses a positioning device for correcting the position of a glass substrate. The positioning device comprises a rotating rod, a driving mechanism, a synchronous assembly and a clamping assembly, the clamping assembly comprises a first clamping piece and a second clamping piece; the output end of the driving mechanism is rotationally connected with the end A of the rotating rod, the end B of the rotating rod is rotationally connected with one end of the synchronous assembly, the first clamping piece is fixed to the end A of the rotating rod, and the second clamping piece is fixed to the other end of the synchronous assembly. According to the glass substrate alignment device, the first clamping piece and the second clamping piece can be driven by the driving mechanism and the synchronous assembly to clamp the two sides of the glass substrate, so that alignment of the glass substrate is completed, the positioning precision is improved, synchronous movement of the first clamping piece and th