Vehicle suspension is one of the important components of the vehicle driving system, mainly for bearing the weight of the body and reducing the excitation from the road surface, whose performance directly affects the safety and handling stability of the vehicle. It also has a great impact on the riding comfort of the occupants. The traditional passive suspension structure parameters are fixed, the vibration damping effect is limited, and the semi-active suspension can change the damping and stiffness of the suspension through the control algorithm, which can achieve the same control effect as the active suspension, and the structure is simpler and lower in cost than the active suspension. Air springs and magnetorheological dampers can change the stiffness and damping of semi-active suspension, respectively, and are important for semi-active suspension damping. On the basis of introducing the working principle and single control strategy of magnetorheological semi-active air suspension, this paper focuses on the composite control strategy of magnetorheological semi -active air suspension, and finally discusses the development trend and problems of magnetorheological semi-active air suspension, so as to provide further reference for the technical development of magnetorheological semi-active air suspension.