Elelectro permanent magnetic(EPM) round plate is widely used in a variety of machine tool rotary working platform, such as CNC five-axis machining center, horizontal Lathe and big boring machine, horizontal machining center, deep hole drilling, drilling and milling machine and six-axis deep hole drilling, etc., as the machine tool for the rapid fixture for machining to provide efficient workpiece clamping, greatly improve production efficiency, reduce manufacturing cost.