Positioning mechanism of carving machine

The utility model relates to the technical field of engraving machines, in particular to an engraving machine positioning mechanism which comprises an engraving machine body, an engraving table, moving frames and a positioning frame, the engraving table is installed at the top of the engraving machine body, the moving frames are installed at the front end and the rear end of the engraving table, and a driving assembly is installed at the top of the engraving machine body and located below the moving frames. The positioning frame is installed at the top of the moving frame, a first two-way screw rod is rotationally connected to the interior of the positioning frame, first moving seats are installed at the left end and the right end of the first two-way screw rod and located on the inner side of the positioning frame, and positioning plates are installed on the outer sides of the first moving seats; a crank is installed at the right end of the first bidirectional lead screw and located on the outer side of the