Abstract: In this paper, in order to achieve safe and efficient mining of the coal mine, the traditional system of transient electromagnetic method （ＴＥＭ） has the problem of large detection blind area and low detection accuracy, so multi-channel system of TEM is developed. The system uses high precision and small coil array to detect, uses multi-channel sampling technology to carry out synchronous collection. By the experiment of advanced detection in Datong Coal Mine Group, the measured results show that using multi-channel system of TEM can instead of traditional TEM system, and the multi-channel system of TEM can decrease the detection blind area. Under strong interference of roadway, the multi-channel system of TEM has good detection effect, which has widely potential application in the advanced detection of coal mine.