Positioning assembly of full-automatic sheet polishing machine

The utility model provides a positioning assembly of a full-automatic sheet polisher, which comprises a positioning support arranged on a polisher frame, the positioning support comprises a positioning bottom plate, and more than one primary positioning assembly and secondary positioning assemblies in one-to-one correspondence with the primary positioning assemblies are arranged on the positioning bottom plate. The positioning rod can provide accurate positioning for the jig frame, and the jig frame can be quickly fixed through the locking clamp; according to the method for accurately positioning the sheet by matching the fixed positioning block with the movable limiting device, the fixed positioning block is arranged, so that the sheet can be positioned only by starting the movable limiting device to push the sheet to be in contact with the fixed positioning block; the problem that in the prior art, a positioning device cannot achieve accurate positioning of the sheet due to the existence of a real positioni