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By means of the fuzzy control and sliding mode control method combined, a sliding mode controller based on fuzzy change gain regulation is presented for gas flow regulation servo system. The uncertain section of solid rocket ramjet motor flow regulation servo control system is compensated by sliding mode controller , thus solid rocket ramjet motor flow regulation servo system achieve robust control. Solid rocket ramjet motor flow regulation servo system was modeled and simulated based on the use of MATLAB, and compared with sliding mode control method alone . The simulation results show that the solid rocket ramjet motor sliding mode control system based on fuzzy change gain regulation has preferable given adaptability and immunity to interference, Which adopt fuzzy and sliding mode control method based on fuzzy change gain regulation can effectively inhibit the system random interference’s disadvantageous influence to control system and can weaken the chattering of control signal input,Which anti-jamming ability and control result were better than sliding mode control method alone. Therefore, the proposed fuzzy and sliding mode control method lay the foundation for improvement of dynamic performance of solid rocket ramjet motor flow regulation servo control system.