Large-stroke wide-breadth laser cutting machine clamping workpiece leveling device and leveling method

The invention relates to a large-stroke wide-breadth laser cutting machine clamping workpiece leveling device and a leveling method.The large-stroke wide-breadth laser cutting machine clamping workpiece leveling device comprises a workbench, a wide-breadth table is arranged above the workbench, rotating assemblies are arranged above the wide-breadth table and on the side of the wide-breadth table, and a limiting assembly is arranged at one end of the wide-breadth table and comprises a rail bar and a sliding way; a finger strip parallel to the wide-face table is arranged on the side, close to the rail strip, of the wide-face table, an angle measuring ruler used for measuring the angle of the finger strip is arranged on the rail strip, and the end, close to the rail strip, of the side block is fixedly connected with a limiting block. The leveling method comprises the following steps that firstly, the clamping workpiece is fixed to the wide-face table, secondly, the position of the limiting block is adjusted, an