Due to the characteristics of strong coupling, strong nonlinearity and large time delay, the accurate mathematical model of the 2.4 m transonic wind tunnel can not be obtained, and the control accuracy of the classical PID algorithm can not meet the test requirements, so a composite controller based on feedforward and fuzzy PID strategy is designed and applied to the wind tunnel test. The experimental results show that the application of the controller has a good effect on improving the accuracy of flow field control.