The integrated flight/propulsion control system of a new fighter and its new turbofan engine are studied in this paper.Firstly,the models for the flight sub system and propulsion sub system are proposed,and then the model for integrated flight/propulsion system is set up.Secondly,the integrated flight/propulsion controller is designed based on the hybrid sensitivity approach;some key problems in controller design are discussed.Finally,the simulation results indicate that the designed integrated controller has good performances.