When the main components meet the performance requirements

weight reduction is of positive significance to increase the thrust-to-weight ratio of small turbojet engines. Analyzing the space structure of the small turbojet engine

choosing the integral impeller for lightweight design

and giving a preliminary hollow structure plan. Based on the additive–subtractive hybrid manufacturing

this paper designed the complete process and testing plan of the hollow centrifugal impeller

using Powermill software to verify the process and optimize the additive–subtractive hybrid manufacturing. The feasibility of the overall process is verified through the additive–subtractive hybrid manufacturing

and the machining accuracy of the hollow centrifugal impeller is inspected to verify the machining accuracy. The application of the additive–subtractive hybrid manufacturing has positive significance for the process design of complex structures.