Repetitious chemic switchs were used to investigated the transmission performance, electromagnetic shielding performance, switch time,surface morphology of controllable wave-transparent materials before switch and after switch. The results show that at 6 GHz to 18 GHz frequency, the increase of switch degree has little effect on transmission performance(more than 90%)of materials at wave-transparent state, while electromagnetic shielding performance (more than 44%)of materials at shielding state is enhanced, switch time of wave-transparence/ shield is prolonged,the time of switch from stealth to wave-transparence is less than 10 s, the time of switch from wave-transparence to stealth is less than 30 s and the ammonium chloride appears on surface of materials,when the switch times are below ten.