In order to solve the probrems such as the machining defects such as delamination, burrs, and chipping due to the poor stiffness and easily deformation of the launcher container, the technology on mechanical processing and optimize the process on a weapon composite launcher container are studied. Result of the test shows that the machining defects can be effectively controlled to ensure the quality of launcher container by designing a reasonable clamping method, optimizing the cutting tools and machining parameters. By optimizing the different processing steps and overall planning, the working time is shortened from 100 h to 46 h, the production efficiency is increased to 54%, significantly reduced the production costs.