<p>The central temperature field of the hub motor under various speed conditions of the hub motor is analyzed as a reference to explore the fatigue life of the hub motor bearing under thermal-mechanical coupling. The hub bearing model was verified by theoretical derivation and experimental verification. Finite element analysis of six typical working conditions of the model is carried out under the temperature field of the hub motor, and the fatigue life, contact stress, strain, and other parameters of the hub motor bearing are evaluated under different working conditions. Analysis results show that the fatigue life of the bearing under the temperature field of the hub motor decreased significantly and that a good correlation exists between stress and life, and strain and life. The corresponding fitting formula can be used to predict the fatigue life of the hub motor bearing under different contact stress and strain conditions.</p>