Based on the simple method, good orientation, large ranging, sensitive to water, high efficiency of exploration, large scope of exploration of transient electromagnetic method in mining, the method was adopted by Fengfeng Group in 112121, 11296, 112141 working face, with verification of hydrological condition detection. The result showed that the transient electromagnetic method could identify the abnormal position, scope and detection result of the watery by multi-angle, multi-section comparison, the detection result was reliable and accurate, with good effect in Xin’an Mine, with guidance and practical value of Underground hydrogeological conditions exploration.