Vibration reduction clamping tool for large thin-walled workpiece

The invention provides a vibration reduction clamping tool for a large thin-walled workpiece. The technical problems that an existing thin-wall workpiece clamping tool is complex in structure, inconvenient to mount and dismount, low in positioning precision and poor in clamping quality, a self-excited vibration phenomenon is prone to occurring, thin-wall workpieces deform due to states of materials, thermal stress in a machining process and the like, and the clamping use requirements of the thin-wall workpieces of different sizes cannot be met are solved. The vibration reduction clamping tool for the large thin-walled workpiece comprises a positioning base plate, a thin-wall workpiece is arranged on the positioning base plate, a pressing assembly is arranged on the upper portion of the thin-wall workpiece, a main pull rod is axially arranged in the thin-wall workpiece, the two ends of the main pull rod are fixedly connected with the positioning base plate and the pressing assembly respectively, a plurality of