Abstract: through the study of the physical field characteristics of the transient electromagnetic two field response, the original data is extracted and analyzed. The electrical characteristics of the observation window are studied. The starting point of the observation window and the end point of the late two field observation window are determined, and the maximum effective observation range in the detection distance is determined. Through the TemProcess fine interpretation technology, high resolution apparent resistivity results are obtained. Through the application of engineering cases, it can be seen that the transient electromagnetic fine interpretation technology can greatly improve the vertical resolution of transient electromagnetic, and the abnormal delineation position is highly consistent with the actual exposed position, and it is of great significance to the prevention and control of water damage in the goaf.