The utility model relates to an intelligent protective type disc electromagnetic coupling which consists of three parts, i.e. a motor rotating body, a load rotating body and a rotating speed control system, wherein a unique double-disc type induction device, a structure with the air gap being fixed and the axial effective size being optimized and an efficient cooling fin are adopted to form a magnetic carrying disk embedded with a permanent magnet. Due to the relative rotation of an induction copper disc and a permanent magnetic disc, a magnetic conductor can cut magnetic lines of force of the permanent magnet to generate magnetic induction force through the fixed air gap, contactless torsion transmission between a motor and a load is realized through the magnetic coupling effect, and the fully-automatic protection to the motor and the intelligent protective type disc electromagnetic coupling is realized by the rotating speed control system when in overload. The intelligent protective type disc electromagnetic coupling is a non-contact type coupling which allows larger error of centration, is easy to install, realizes the soft start and the overload protection of the motor, eliminates harmful vibration, abrasion and fracture, has long service life, reliable operation and high transmission efficiency, does not need to be maintained and avoids the damage caused by the overloading.