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The traditional aircraft attitude sliding film control system has the problem of poor stability of the aircraft attitude adaptive coefficient. It will be affected by multiple factors during the control process, resulting in an increase in the flight attitude controllable error coefficient, and the auxiliary control system needs to be corrected to complete the flight attitude Control operation. Aiming at the above problems, an adaptive sliding mode control system of aircraft flight attitude based on AFSMC algorithm is proposed. The system hardware is based on the PID adaptive sliding mode controller, and the aircraft attitude controller is designed; the software part adopts the adaptive sliding mode control strategy to adapt the PID controller attitude control variables; introduces the AFSMC algorithm to calculate the attitude controller The motion control equation at the current time point is used to obtain the optimal amount of flight attitude adaptive sliding mode control, and the design of the aircraft flight attitude adaptive sliding mode control system based on the AFSMC algorithm is completed. The experimental results show that the designed system can accurately control the flight attitude of the aircraft under different flight conditions. The overall control accuracy of the system ranges from 90% to 97.4%. The flight control stability of the aircraft is good, which effectively improves the system’s impact on the aircraft. Control accuracy of flight attitude.