Grinding tool of high-precision rolling mill box

The utility model provides a grinding tool of a high-precision rolling mill box body, which comprises a circular guide rail contact, the guide rail contact comprises an insulating plate box body, a circular guide rail is installed on the insulating plate box body, a coil is installed in the circular guide rail, a fixed contact is installed on the coil, and the insulating plate box body is installed on a spindle stand column of a boring mill; the movable contact switch is mounted on the boring machine facing head and can rotate along with the boring machine facing head; and the grinding head fixture is mounted on the facing head of the boring machine. The grinding tool for the high-precision rolling mill box body is reasonable in design and convenient to operate, the guide rail type contactis installed on a vertical column of a main shaft of a boring mill, the movable contact and the white corundum grinding wheel grinding head clamp are installed on a facing head of the boring mill, the precision of the rollin