Abstract: This paper proposes an enhanced integrated guidance and control strategy to address input saturation and angle-of-attack constraints encountered in aircraft integrated guidance and control (IGC) systems. This strategy enhances system tracking accuracy and mitigates input saturation effects by incorporating an integral error correction term and an adaptive compensation signal. Concurrently, an adaptive estimator based on a fast sliding mode mechanism is designed to address external disturbances, ensuring rapid convergence of estimation errors. Furthermore, robust terms are introduced in the virtual controller design to improve the system's suppression capability against external disturbances. Theoretical analysis demonstrates that the proposed strategy ensures all signals in the closed-loop system remain consistent and ultimately bounded. Simulation results indicate that, under external disturbance conditions, state variables such as angle of attack and sideslip angle are strictly confined within preset physical limits, with smooth control commands effectively preventing system oscillations caused by input saturation. This strategy significantly improves the stability of IGC systems under complex constraints, achieving high-precision and stable tracking of guidance commands.