The invention discloses a magnetic suspension prevention micro bearing rotor system which comprises a suspension system and a rotary drive system. The suspension system and the rotary drive system areplaced oppositely, and a work air gap exists between the suspension system and the rotary drive system. The suspension system comprises a suspension rotor and a magnetic field providing device. The suspension rotor is in a disc shape and is located above the magnetic field providing device. A suspension air gap formed through a magnetic field is arranged between the suspension rotor and the magnetic field providing device. The suspension rotor is made of an anti-magnetic material. An electromagnet or permanent magnet is adopted as the magnetic field providing device. A magnetic field drive system or an eddy current drive system is adopted as the rotary drive system. According to the magnetic suspension prevention micro rotor system, the active rotating function of the magnetic suspensionprevention bearing rotor system is achieved, eddy current losses during rotor rotating can be reduced, bearing microminiaturization is achieved, normal-temperature, passive, friction-free and static stable suspension can be achieved without any energy input, and suspension is stable.