Abstract: In order to solve problem of less information and complex detection work existed in conventional radio wave penetration method, the paper proposed a radio wave penetration method with time-domain pulsed based on impulse. It analyzed the frequency response of ideal electromagnetic pulse through a certain thickness of different media within a limited band by simulation, and draw a conclusion as follow: the radio wave penetration method with time-domain pulsed based on impulse has wider frequency range, which can increase amount of extracted information and improve detection accuracy; the electrical parameters and absorption coefficient of different medium are different, and the medium on the absorption of electromagnetic waves are different, can accordingly distinguish the different geological formations.