Abstract:In machinery processing,products quality was affected by many factors,but it was affected most by the process quality.Taking the rotary body processing as a research object,based on mathematical modeling,through sampling check,data analysis,technology calculation,parameter optimization and technology validation,improvement of processing precision was reached.And in the premise of a large amount of practice,aiming at the appeared processing errors due to non-stable process capacity in rotary body processing,the optimization program was made.