<p>The scroll plate, a thin-walled structure with the vortex curved surface, is the core component affecting the performances of miniature scroll compressor. It is challenging to fabricate the scroll plate in high precision since during the milling process of the vortex curved surface, the milling force exhibits very complex behaviors. Aiming at this point, the geometric modeling of vortex curved surface milling process is carried out. Based on the actual cutting trajectory influenced by trochoid trajectory, a milling force model of the vortex curved surface is established. Then, the force model is experimentally calibrated and verified. Under the premise of identical material removal rates, the influence degrees of the axial depth of cut and the feed per tooth on cutting forces are comparatively analyzed. The results are applied to guide the improvement of the micromilling efficiency for finish machining the scroll plates. It indicates that the axial depth of cut has a significant impact on the fluctuation amplitude of the milling force. Therefore, a machining strategy of increasing the feed per tooth is proposed in order to reduce dimensional deviation of scroll plates and improve machining efficiency simultaneously. The strategy has been successfully verified. The dimensional deviation of the scroll plate is reduced by 59.5%, and the volumetric efficiency of the scroll compressor is increased by 6.1%. The study could work as a reference for the high-precision machining of vortex thin-walls.</p>