Attitude determination and control problems are the key problems of flight control of unmanned aerial vehicle（UAV）.A flight control system of a high subsonic UAV is designed

which includes flight control computer

integrated navigation computer

electric servo actuator

sensors

flight parameters recorder and ground checkout unit.An attitude measurement system composed of speed gyro

accelerometer

magnetic heading meter and GPS

and an attitude determination algorithm based on information fusion Kalman filtering is given.An attitude control strategy based on three single-variable control loops is designed.The simulation results show the effectiveness of the high subsonic UAV attitude determination and control methods.