In order to solve the strong coupling among control variables of aeroengine，a system of multivariable decoupling control based on fuzzy RBF network for aeroengine is presented.Multivariable decoupling controller of aeroengine based on fuzzy RBF network is designed. Parameters of PID controller and weight-value are adjusted online respectively by fuzzy RBF network and Delta rule to achieve the best control.The control system is simulated by computer in allusion to a nonlinear model of a certain aeroengine with unmodeling dynamics and random interferes such as noise, etc. Simulation results show that the system has satisfactory dynamic performance and decoupling speciality and the method is applied with no necessity to know the accurate model of aeroengine and has perfect self-adjusting capability to the nonlinearity and uncertainty of aeroengine.