The invention belongs to the technical field of magnetic 
grinding and 
polishing, and particularly relates to an ultra-high-speed rotating cylinder type permanent 
magnet polishing device. The ultra-high-speed rotating cylinder type permanent 
magnet polishing device is characterized by comprising a casing, a 
Tesla turbine, a container, a non-magnetic cylinder, a group of permanent magnets I and a group of permanent magnets II, wherein the 
Tesla turbine is arranged in the casing; the container is arranged at the upper part of the casing through a fixing frame; the non-magnetic cylinder is connected with an output shaft of the 
Tesla turbine; the group of permanent magnets I are fixed to the bottom of the non-magnetic cylinder through a magnetic 
metal plate; the group of permanent magnets II are fixed to the periphery of the non-magnetic cylinder through a magnetic conductive 
metal sheet; and the container is arranged inside the non-magnetic cylinder. Permanent 
magnet arrangement polishingand 
grinding machining is used; a still magnetic steel needle in the container is magnetized; along with the ultra-high speed rotation of the cylinder driven by the Tesla 
turbine, a generated rotatingmagnetic field is used for driving the steel needle to polish the surface of a workpiece; the Tesla 
turbine can exceed the upper limit of the speed of a used motor and reaches tens of thousands of 
revolutions per minute; and when the rotating speed is higher, the polishing efficiency of the cylinder type permanent magnet polishing device is higher.