Abstract: In this paper, an algorithm of state variable feedback predictive control is given, it makes the structure of the system different from the IMC framework, this algorithm may be used to stabilize an unstable controlled process, unknown disturbance rejection is also improved. The properties of the predicive control system was analyzed, some necessary and sufficient conditions of stability are presented. All of these are demonstrated by simulation results and application to a commercial Fluidized Catalytic Cracking Unit.