In order to find out the distribution of water abundance abnormal area in front of the concentrated belt roadway in the upper coal group of Zhengming Coal Industry, the transient electromagnetic method was used for advanced detection at 25 m before No.P19 point in the concentrated belt roadway of the upper coal group. Since the detection roadway had low-resistance interference bodies such as drilling rigs and roadheaders, conventional transient electromagnetic method and roadway-hole transient electromagnetic method were used to detect and compare the detection effects. The roadway-hole transient electromagnetic detection method replaced the large transmitting wire frame with a multi-turn small coil. The transmitting coil and receiving device were arranged in the hole. The drilling hole was used as the construction space. The roadway-hole transient electromagnetic technology was used to expand the scope of drilling control, and the geological abnormities such as unknown collapse columns near the hole could be accurately located. And the purpose of multi-purpose drilling and providing drilling target areas for new drilling holes could be achieved, therefore drilling workload was reduced and production efficiency was improved.