Precision test support frame

The utility model relates to the technical field of supporting frames, and discloses a precision test supporting frame which comprises a base, a lifting mechanism is fixedly installed on the top of the base, an operation table is fixedly installed on the top of the lifting mechanism, a positioning mechanism is arranged on the top of the operation table, and the lifting mechanism comprises a rotating motor. And a rotating motor is fixedly mounted in the base, a fixed cylinder is fixedly mounted at the top of the base, and a threaded rod is fixedly mounted at an output shaft of the rotating motor. According to the precision test supporting frame, a positioning mechanism is arranged, a workpiece can be clamped and fixed through the positioning mechanism, a driving motor can be started during operation, the driving motor drives a gear to rotate clockwise and drives two toothed plates to move towards the opposite sides, and then two connecting plates drive positioning plates to get close to each other; therefore,