High-precision reinforced adapter sleeve

The utility model relates to the technical field of adapter sleeves, in particular to a high-precision reinforced adapter sleeve which comprises an adapter bush, threads are arranged on the outer ring of the top of the adapter bush, a locking nut body is sleeved on the outer ring of the top of the adapter bush in a threaded mode, a side block is fixed on the outer ring of the locking nut body, and a rectangular bottom groove is formed in the bottom wall of the side block. A horizontal side column is fixed to the outer ring of the fastening bush located on the lower side of the locking nut body, a vertical guide sleeve is fixed to the side end, away from the fastening bush, of the side column, a vertical insertion bolt is movably arranged on the inner ring of the guide sleeve, the top of the insertion bolt is movably arranged in the bottom groove, and the bottom end of the insertion bolt extends to the lower side of the guide sleeve and is fixedly provided with a pull block. And the bottom end of the guide sle