Anti-deviation positioning device

The utility model relates to the field of positioning devices, in particular to an anti-deviation positioning device. Comprising a workbench and side plates symmetrically arranged on the two sides of the upper end of the workbench, two limiting plates are symmetrically and rotationally arranged at the upper end of the workbench, n-shaped connecting shells are fixedly arranged on the opposite sides of the two limiting plates, an abutting plate is arranged between the two n-shaped connecting shells, sliding grooves are formed in the inner bottom faces of the two n-shaped connecting shells, and sliding blocks are slidably arranged in the sliding grooves; the two ends of the abutting plate are rotationally connected with the upper ends of the sliding blocks correspondingly, an outer threaded rod is rotationally arranged in the middle of one side plate, one end of the outer threaded rod is sleeved with an inner threaded sleeve, a clamping plate is arranged at one end of the inner threaded sleeve, and a reset assem