Active steering system refers to installing a set of speed change device in the steering wheel system to adjust the steering transmission according to the vehicle speed. The active steering system includes a fist-sized planetary gear and two output shafts, one of which is connected to the steering wheel and the other is controlled by an electric motor through a spiral gear. In the process of driving, when the vehicle speed is slow, the active steering system will increase the steering angle, and when the vehicle speed is too high, it will control the motor to rotate in the opposite direction, thus reducing the steering angle. The active steering system greatly improves driving safety. Even when the driver turns, with the help of the active steering system, the driver can still maintain an ideal sitting position, further enhancing the handling performance of the car. Active steering system makes it easier for cars to drive on highways, because it can reduce the steering sensitivity at high speed and enhance the stability of the steering wheel. Even in the face of sudden steering action, the operation can still be very smooth. The steering torque generated by the active steering system can provide more power and prevent the steering wheel from losing control.