The invention relates to a slot-less asynchronous electric motor, which includes a stator and a rotor, the rotor includes a rotary shaft, which is covered with two polar plates, the stator includes a stator iron core and the stator coil winded on the stator iron core, each plate of the rotor includes even magnetic polar arranged with radiating shape evenly, each magnetic polar is connected together with several pieces of cool rolling high silicon orientation silicon steel plates, each plate is produced according to the orientation direction, each magnetic polar is winded with rotor coil, the winding directions of the rotor of the joined magnetic polar are reverse, the quantity of the stator iron core is the integer times of 3 which is the quantity of the magnetic polar, the stator iron cores are arranged along the circle evenly, and fixed in the slots of the two ring plate, each stator iron core is connected together with several pieces of cool rolling direction silicon steel plates, each piece of cool rolling orientation silicon steel core is produced with the orientation direction, there has a gap between each magnetic polar and the stator iron core. The efficiency of the asynchronous electric motor is upgraded about 8%-10% compared with the universal Y series asynchronous electric motor, and the utilization rate of the material is upgraded greatly.