介绍一种自由曲面数字化磁性磨粒光整加工机床，着重介绍其原理、结构、组成、工具、磁性磨料、曲面数字化测量和编程方法。该机床通过对模具曲面的数字化测量和自动编程，得到磁极与工件保持一定间隙沿工件表面运行的加工轨迹，利用吸在工具磁极上的磁性磨料为工具，通过磁极带动磁性磨粒作高速旋转，实现工件自由曲面光整加工的自动化。 A kind of freeform surface digital magnetic abrasive grain finishing machine is introduced. The principle, structure, composition, tools, magnetic abrasive, surface digital measurement and programming method are introduced emphatically. The machine tool through the digital measurement of the mold surface and automatic programming, to get the pole and the workpiece to maintain a certain gap along the workpiece surface running track, the use of magnetic tools sucked magnets on the tool as a tool, driven by the magnetic pole magnetic particles for high-speed rotation, Automation of workpiece freeform finishing.