Abstract: The paper presents the design and manufacture of controlled bonnet polishing system used for large aspheric lenses polishing. Kinematics simulations of the designed structure show that, the workspace of the spin axis of bonnet tool can meet the requirement of large aspheric lenses polishing with continuous precession processing. A polishing experiment on the circular flat workpiece with a radius of 320 mm has been carried out. The profile accuracy of the workpiece is fine after 24-hour polishing. The surface roughness reduces from 0.272 to 0.068, and the peak-to-valley value reduces from 1.671 to 0.905. The results of the experiment show that the controlled bonnet polishing system is featured with high precision and high stability, meeting the design requirements, and the system can improve the profile accuracy of workpieces effectively.