High-efficiency low-loss processing method for brittle material

The invention discloses a high-efficiency low-loss processing method for brittle materials, and belongs to the technical field of precision processing of brittle materials. Comprising the following steps: 1) after determining a to-be-processed brittle material, determining the unidirectional crack propagation critical cutting depth of the to-be-processed brittle material; (2) the actual machining depth of the brittle material to be machined is determined, and the actual machining depth is smaller than the critical cutting depth of one-way crack propagation of the brittle material; (3) tool setting is conducted on the pre-machining face of the workpiece, the posture of a tool is adjusted, the tool is made to rotate by a certain angle in the pre-feeding direction, and the tool is matched with the tool to cut the to-be-machined brittle material along the vibration track; by means of a multi-feeding mode, cracks, deviating to one side of the pre-feeding feeding direction, of the machined surface generated by feed