Gear grinding tool

The utility model discloses a gear grinding tool which comprises a bottom shell, a bearing seat and a first driving motor combined with a grinding wheel, a sliding structure is arranged in the bottomshell, the top end of the sliding structure is fixedly connected with the bearing seat, a first threaded shaft is movably connected in the bearing seat, and a first driving block is arranged outside the first threaded shaft. The first threaded shaft is movably connected to the interior of the bearing seat, the first driving block is arranged outside the first threaded shaft, the fixing plate is fixedly connected to the top end of the first driving block, and the first rotating disc is arranged on one side of the first threaded shaft. The first rotating disc drives the first threaded shaft to rotate, the first threaded shaft drives the first driving block to horizontally move through threaded connection, so that the fixing plate slides along the sliding groove, the frame body horizontally moves, the horizontal posi