The present invention refers to a speed change mechanism with magnetic torque transmission using two stages of epicyclic transmission, with four bases, containing each base at least one magnetic poles ring, the first stage has one base with orbital motion and one base reciprocal to the housing concentric with the two shafts, the second stage has one base with rotational motion concentric with the lower rotation shaft and one base with orbital motion reciprocal to the orbital motion base of the first stage, the torque transmission of each stage is done by the magnetic poles rings of each base, and the transmission ratio change is done by changing the pair of magnetic poles rings that are transmitting torque.