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Supersonic anti-ship missile flies with the special trajectory that initially cruises at high altitude, and cruises at low altitude at the end of its trajectory. As the difference of aerodynamic parameters between high altitude and low altitude is great, the missiles' control performance must be very good. Sliding mode control can strengthen system's robustness and sensitivity, so it is appropriate to control missile's flight trajectory. But the chattering caused by SMC may badly affect system's stabilization. To overcome the shortcoming, a fuzzy sliding mode controller combined fuzzy control with SMC was designed. Not only the controller keeps good robustness and sensitivity, but also it can efficiently reduce the chattering. Simulation results show that the method is effective.