Clamping device and method for processing workpiece

The invention discloses a fixture device used for the mechanical manufacturing field, which comprises a fixed component and a clamping component which is used for installing machining tools or workpieces, is fixedly connected with the fixed component in a slidable way, and can be positioned on a plurality of positions on the fixed component. When applied force reaches a certain value, the clamping component goes backward and is fixed on another position on the fixed component. The device can effectively prevent the damage of the machining tools and the workpieces caused by excessive force between the machining tools or workpieces in the machining process.