The anti-roll bar is used to reduce the inclination of the vehicle body through the action of the torsion bar spring. It is fixed on the lower arm of the suspension system or above the shock absorber through a connecting rod; there is an end point connected to the suspension at 1/3 of the ends of the anti-roll bar. When the car turns, it will cause the car body to tilt outside the curve due to the centrifugal force. The inclination range is between 7 and 9 degrees; if the inclination angle is too large, a rollover accident is likely to occur. When cornering, the anti-roll bar can reduce the degree of roll of the vehicle body and improve the tire's adhesion to the ground. The reduction of the degree of roll can reduce the load on the outer wheels and reduce the amount of load reduction on the inner wheels.