Abstract: In view of the increasing production tasks of the aerospace industry, the research on the efficient processing technology of aerospace engine parts has become one of the important means for enterprises to deliver production tasks. For parts with large machining allowance, high precision requirements and eccentric structure, the dynamic imbalance of parts can be effectively adjusted through the design of special tooling, so as to effectively improve the machining efficiency of parts. For a large part with obvious eccentricity, by adding counterweight and adopting multi-point auxiliary support, the parts are fully restrained, the overall rigidity of the part processing system is increased, and its processing efficiency is greatly improved. The static simulation of the special fixture designed is carried out, the stress and displacement under high speed operation are analyzed, and the actual maximum machining speed of the part after the fixture is introduced is predicted. At the same time, the experimental verification is carried out, and finally the machining efficiency of the part is increased by at least one times.