In order to solve the problem of large machining deformation and poor surface quality of LF2 aluminum alloy flapper parts,a double-tool turning process was proposed.Through theoretical analysis,the machining parameters were the key factors to control the double-tool turning results;the Latin hypercube method was used to design the test scheme,through trend analysis and statistical analysis for the test results,the influences of the machining parameters on the machining results were explored;a single-objective empirical formula was established based on the response surface method,and the contour profiler module of the JMP software was used to solve the multi-objective optimization of the machining parameters,and the optimization results were verified in actual machining.The results show that by using double-tool turning machining parameters that meet multi-objective optimization,the precise control of the machining deformation and surface roughness of LF2 aluminum alloy flapper parts can be achieved;the proposed scheme has practical engineering applications value.