Abstract: Free-form optical elements are more and more widely used due to their superior optical performance.At present, some free-form optical element airbag polishing precession motion control methods have been proposed.This paper conducts experimental processing verification for these precession motion control methods.First, it introduces the more mainstream precession motion control theory, and summarizes the experimental processing operation methods.According to the existing precession motion control methods, the two virtual axes of the airbag polishing robot are calculated.And input the angle value to the airbag polishing machine toofor experimental processing.The surface quality of the final processed workpiece meets the requirements, which proves the correctness of the existing free-form optical element airbag polishing precession motion control method.