Rare earth magnetic materials with high properties and low cost are the critical components of modern technology and national defense sophisticated techniques, especially for the rotating electrical machines such as traction motors and generators. But their fairly higher conductivity leads to larger eddy-current losses due to slot ripple and inverter during the service process, resulting in temperature rise and even thermal demagnetization. To solve the eddy current and temperature rise, the systematic investigations have been done on rare earth permanent magnetic materials with high electrical resistivity. In this paper, recent developments in dopants, insulation coating techniques of magnetic powders and forming techniques for high electrical magnets have been reviewed. The research on the bonded, die-upset and sintered rare earth permanent magnetic materials with high electrical resistivity have summarized. Prospects of developing high electrical resistivity composite magnets are presented.