Abstract: This paper disscusses the design principle of the gas actuator used asthe aerodynamicsimulation load device, andthe calculation of the aerodynamic simulation load by usingthe inclined plane and ascending method. It is shown that thescheme of the aerodynamic simulation load device is practicable; theaerodynamic loads of missile wings can be simulated in a practical andequivalent way, which may greatly reduce the timeand expense for related development.