High-precision main panel machining clamp

The utility model relates to a clamp. The utility model relates to a clamp, in particular to a high-precision main panel machining clamp. The magnetizing and demagnetizing device comprises a mounting frame, a magnetizing and demagnetizing device, a magnetizing plate, a first guide column, a second guide column, a first steel plate and a second steel plate, the two ends of the magnetizing plate are fixedly installed through an installation frame. A magnetizing and demagnetizing device is arranged below the magnetizing plate; a first guide column and a second guide column are fixedly mounted on the surface of the magnetizing plate through bolts; according to the utility model, the magnetizing and demagnetizing device, the magnetizing plate, the first guide pillar, the second guide pillar, the first steel plate and the second steel plate are matched with one another, so that the structure is simple, the design is reasonable, a main panel can be conveniently clamped, and the stability of the main panel can be ens