Focus on the vehicle stability in critical situations, we proposed a novel integrated control algorithm for the four-wheel steering and active suspensions system. A single-track reference model and a two-track active suspension model were established to induct the integrated control matrix. According the Model Prediction Control algorithm, an integrated controller was designed. Using CarSim and Matlab, a whole vehicle model with the integrated controller was built and validated by real vehicle test data. Dynamics simulations were done to obtain the responding curves to the fishhook steering input, including the yaw velocity, cornering angle of the vehicle mass center and the body roll angle etc. The stability control quality under this typical critical condition was discussed. The simulation results shew that the integrated control system can significantly improve the stability of the vehicle.