The transverse stabilizer bar is the key safety part in the suspension system of automobile. As a typical component affected by fatigue force, its performance is very important for driver‘s comfort, safety and handling stability in driving. Therefore, improving the fatigue performance of the stabilizer bar is very important to extend and reduce the service time and failure risk of the stabilizer bar. As a mechanical surface strengthening method widely used in industrial production, shot peening has become an essential process in the production process of stabilizer bar because of its obvious effect on fatigue life improvement.