Sapphire feeding tool

The utility model relates to the field of machining, in particular to a sapphire feeding tool which comprises a bottom plate and a correcting device arranged at the top of the bottom plate, the correcting device comprises a table top, a limiting mechanism and a driving mechanism, the limiting mechanism comprises a guide rod, a first V-shaped block, a second V-shaped block and a screw rod, and the guide rod is arranged at the top of the table top. The screw rod penetrates through the table top to be screwed and fixed on the bottom plate, the screw rod is in threaded connection with a nut, the first V-shaped block and the second V-shaped block are consistent in structure and are arranged on the guide rod in a spaced mode, and the driving mechanism comprises an air cylinder support, a double-rod air cylinder arranged on one side of the air cylinder support and a hand-operated direction valve used for driving the double-rod air cylinder. The double-rod air cylinder comprises two piston rods of the same structure,