Marking positioning jig and marking machine

The utility model provides a marking positioning jig and a marking machine, comprising a jig body, the jig body is used for being arranged at the top of a marking substrate, the jig body is provided with a plurality of limiting unit groups used for installing zirconia discs, the plurality of limiting unit groups are arranged at intervals along a first direction, each limiting unit set comprises a plurality of limiting units arranged at intervals in the second direction, the first direction is perpendicular to the second direction, a plurality of positioning connecting holes are further formed in the jig body, and the jig body penetrates through the positioning connecting holes through fasteners to be fixedly connected with the marking base plate. In this way, after the zirconia disc is placed in the limiting unit, the zirconia disc can be prevented from deviating in the process of moving to the marking point, the accuracy of the marking position is guaranteed, the stability of connection between the whole jig