The invention relates to a automobile slot-less alternate electric generator, which includes a stator, rotor and commutator, the rotor includes a rotary shaft, which is covered by the belt wheel, two polar plates and a sliding ring contacting to a carbon brush, the stator includes a stator iron core and stator coil winded out of the iron core, each polar plate of the rotor includes even magnetic polar arranged with radiating type evenly, each magnetic polar is overlapped and connected together with several pieces of cool rolling direction silicon steel plates, each plate is produced according to the orientation direction, each magnetic polar is winded with excitation coil, the winding direction of the joined excitation coils are reverse, the quantity of the stator 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 electricity generating efficiency reaches above 75%.