This paper centers around rotor dynamic investigation of the attractive levitation based fast electrical machine First and foremost, the powerful model of the attractive levitation rotor is laid out and the help solidness of the attractive heading is determined. Moreover, the rotor framework’s dynamic investigation with ANSYS programming is carried out with the supposition that attractive bearing is considered as a specific firmness of spring model. Finally, the critical speeds and vibration modes of the rotor system are uncovered. In addition to providing theoretical support for the safe operation of the rotor system, the analytical result also contains the global stiffness and mass matrix coefficients [M] and [K], the damping matrix coefficient [C], and the external force vector [F(t)]. In the event that there is no outer power, it is free vibration condition and {F(t)}=0. The damping effect can be ignored when calculating natural frequencies and modes for free vibration. As a result, the free vibration equation will be simplified in the following manner: by utilizing lower-order critical speed control, but it will also serve as an important reference for the rotor’s structure design and optimization.