Abstract: A magnetic damping device includes a flying wheel having a recess centrally defined therein. An annular magnet sensitive element is securely attached to a periphery of the recess. A seat is received in the recess in the flying wheel and has two curved plates pivotally mounted thereon. The two curved plates correspond to the recess. Each curved plate has multiple magnets mounted thereon. The magnetic damping device provides a damping when the flying wheel is rotated relative to the two curved plates and the damping is changed when the distance between the magnets and the annular magnet sensitive element is adjusted.