The processing method of large-scale aluminum alloy precision parts is also simple. The first method of clamping large-scale Aluminum alloy parts processing is reasonable. The flying knife can be used as much as possible. The flying knife is easy to cause the workpiece to generate heat and deformation, so it is necessary to do the front and back to prevent deformation and thickening. After roughing, the planes of the two faces should be leveled to ensure that the workpiece is vertical and then the light knife is made. The thickness margin should be sufficient to ensure that there is a possibility of remediation if there is an abnormality during processing.