<p>In order to make permanent magnets of high-speed segmented surface-mounted permanent magnet motors (SMPMM) withstand the centrifugal force generated during high-speed rotation and prevent damage to the permanent magnets, a protective sleeve outside the rotor permanent magnet must be used. A carbon fiber rotor sleeve is one of the protective sleeves. This paper proposes an analytical solution of the carbon fiber rotor strength of segmented SMPMMs considering the pretension of the carbon fiber sleeve winding, the gluing adhesion between the rotor core and the permanent magnet as well as the influence of magnetic suction based on the plane stress theory of elastic mechanics. The reliability of the analytical solution is verified by the high-speed destructive test. It is shown that the analytical solution can accurately calculate the radial stress, circumferential stress and equivalent Mises stress of the rotor core, permanent magnet and carbon fiber sleeve, taking into account the effects of pretensioning of the carbon fiber sleeve winding, adhesive bonding between the rotor core and permanent magnet, and magnetic suction force. The predicted burst rotational speeds of the carbon fiber protective sleeve generated by the model developed in this study demonstrate closer agreement with experimental data when compared to conventional methods.</p>