Grinding device capable of rapidly and accurately positioning

The utility model discloses a grinding device capable of positioning quickly and accurately, which comprises a positioning table, a grinding machine worktable and a grinding cutter, a plurality of positioning grooves are formed in the positioning table, positioning modules are arranged in the positioning grooves, the positioning modules are used for fixing workpieces to be machined, and the positioning modules are detachably connected with the inner walls of the positioning grooves; the positioning table is connected with the grinding machine working table in a magnetic attraction mode, the grinding tool is arranged on the upper side of the table top of the grinding machine tool table, and the grinding tool faces the positioning module and is used for grinding the workpiece to be machined; according to the utility model, the workpiece to be processed is fixed through the positioning modules, and the plurality of positioning modules can be assembled on the positioning table side by side, so that the large-batc