Abstract: For permanent magnet coupling, the copper conductorplate is usually slotless. Based on the fact that the eddy-current of the radial path in the slotless conductor plays a major role in torque transmission performance,a new permanent magnet eddy-current coupling’sstructureis proposed,in which the conductor plate is slotted and the yoke is filled in the slot.On the basis of the original 40kW permanent magnetic coupler, the finiteelementmodel of slotted conductor plate is built and simulated by using Ansoft Maxwell.Compared with the analysis results without slot ,the magnetic induction intensity ,the eddy-current distribution of the air gap magnetic field are discussed.The results show that the magnetic induction of the surface position of the yoke is obviously increased,and the magnetic field between the air gap and the copper spoke is strengthened.Furthermore, the magnetic flux density, eddy current distribution and eddy current loss density diagram under different conditions of slotting angles ,slotting quantities and slotting lengths indicate that sizes of the slot have significant effect on the transmission torque .The results show that the structure of the conductor plate is slotted obtains the the greater transmission torque than the structure without slot .