The invention relates to a clamping method for stabilizing a weak-rigidity
cantilever part, the weak-rigidity
cantilever part is provided with a fixing part and a
cantilever part, the fixing part can be fixed on a
machining plane, and the cantilever part is suspended relative to the
machining plane; according to the clamping method, a wedge-shaped supporting block and a dial indicator are used, the bottom of the wedge-shaped supporting block can horizontally move and slide on the
machining plane, the wedge-shaped supporting block can be fixed on the machining plane when moving to a proper position, the upper portion of the wedge-shaped supporting block is an inclined face, and an included angle larger than zero degree is formed between the inclined face and the horizontal plane. The method is not limited by materials and structures of the cantilever parts, can be applied to most of the cantilever parts, is particularly good in use effect on machining of cantilever weak-rigidity parts on aero-engines, successfully solves the problems of deformation and chattering of the cantilever parts in the
machining process through application of the method, and is good in application effect, low in implementation cost and suitable for popularization and application. The application range is wide and operation is convenient.