A non-contact electromagnetic gearbox comprises an electromagnetic speed control system and an electronic control system. The electromagnetic speed control system comprises a driving electromagnetic wheel, a driving shaft, a main electric slip ring, a driven electromagnetic wheel, a driven shaft and a slave electric slip ring, the main electric slip ring and the driving electromagnetic wheel are fixed on the driving shaft, and the slave electric slip ring and the driven electromagnetic wheel are fixed on the driven shaft; the electronic control system comprises a single-chip microcomputer, a control loop, a high-low voltage opto-isolation circuit, a strong excitation starting element and a rectification/filtering loop, a single-phase source is connected with the strong excitation starting element through a rectification/filter circuit, the single-chip microcomputer is connected with the high-low voltage opto-isolation circuit through the control loop, the high-low voltage opto-isolation circuit is connected with the strong excitation starting element, and the strong excitation starting element is connected with the main electric slip ring and the slave electric slip ring. The non-contact electromagnetic gearbox realizes moment transmission through electromagnetic force, is zero friction and noise-free, does not need lubrication and is clean in working environment so as to improve the product performance index.