The utility model discloses a foil grinding fixture, including operating handle and thin slice chuck, its characterized in that: operating handle's one end is provided with the external screw thread, and the other end of managing the handle is provided with the knob, the one end of thin slice chuck is provided with the internal thread that closes with outer thread to match, and the other end of thin slice chuck is provided with and is used for setting the holding tank by processing foil, it is even as an organic whole that operating handle and thin slice chuck pass through screw -thread fit detachably, is equipped with attraction magnet in operating handle and thin slice chuck screw -thread fit's the space, attracts magnet to hug closely the holding tank to the realization is to the absorption by processing foil. The utility model discloses can press from both sides tightly solid foil, can solve the abrasive machining problem of foil appearance, strength magnets power is huge, and the iron core further increases the adsorption affinity for it is more firm during the use.