The invention belongs to the technical field of the industrial robot, particularly to a magnetic driver used in the silicon slice transmission robot playing the silicon slice transmission and positioning action in the vacuum in the IC manufacturing industry. The magnetic driver comprises a drive input part for realizing the torque introduction, a drive output part for realizing the torque output, a case part and a magnetic circuit part; in the drive input part, the drive input part is connected with an input axis through an end bond, and the external rotor is connected with the input axis through the bond, and fixed with the case through a deep groove ball bearing. In the magnetic circuit part, the internal rotor and the internal permanent magnet, the external rotor and the external permanent magnet all adopt the glue joint. The magnetic driver of the invention has compact structure, tight magnet distribution, small volume, large transmission torque, easy control, stable operation, convenient dismounting, small sport inertia, applied in the vacuum robot with higher cleanness.