The complex thin-walled inner rib structure of the aluminum alloy long tube section is characterized by large dimensions, a high material removal rate, and poor stiffness, making it prone to deformation during machining, resulting in difficulties in controlling the machining precision and quality. The main causes of deformation in aluminum alloy machining include springback deformation, residual stress, cutting force and cutting heat, clamping method, tool pat, cutting parameters, machine tools, etc. The severe machining deformation can affect the final quality of the product and may even lead to product scrap. By analyzing the key factors influencing aluminum alloy machining deformation, this study reasonably selects the partitioned tool path and machining sequences and optimizes cutting parameters, stress relief treatment, and clamping methods of parts, aiming to reduce the residual stress during the machining process, minimize clamping deformation, and increase the machining precision and quality of products.