Optimizing the parameters of the milling process is important for improving processing efficiency, and is based on milling stability lobe construction. However, since the milling force of real work-pieces is not measurable during production, milling force simulation is introduced to analyzed the milling stability lobe graph. First, the milling force and milling coefficients were obtained using finite element simulation. Then, experiments were carried out to obtain the modal parameters of a tool-machine system. Finally, milling stability lobes were constructed based on the above analysis, and the effectiveness of the lobe was verified with an actual manufacturing process. This research can provide a reference for the inhibition of chatter in the milling process by improving the machining efficiency and enhancing the system’s stability. Moreover, it can benefit the actual selection of machining parameters for milling processes.