Large workpiece clamp of optical fiber laser cutting machine

The utility model relates to the technical field of clamps, in particular to a large workpiece clamp of an optical fiber laser cutting machine, which comprises a mounting seat, moving seats are symmetrically and slidably connected to positions, close to the left side and the right side, of the inner wall of the mounting seat, clamp mechanisms are arranged in the moving seats and comprise rotating motors, and output shafts of the rotating motors are coaxially connected with threaded rods. Movable frames are symmetrically and slidably connected to the positions, close to the front and rear sides, of the inner wall of the movable seat, mounting plates are fixed to the inner side surfaces of the movable frames, hydraulic cylinders are fixed to the bottoms of the mounting plates, and fixed plates are fixedly connected to the ends of piston rods of the hydraulic cylinders; according to the large workpiece clamp of the optical fiber laser cutting machine, by arranging the clamp mechanism, a workpiece with a large si