Abstract: In view of the complex geological structure of 13103 working face in Shaping Coal Mine and the dangerous situation of Ordovician limestone underwater mining under pressure, the working principles of radio tunnel perspective, transient electromagnetic and audio frequency electrical transmission were analyzed. Combined with borehole exploration, the water richness of the floor in working face was studied and evaluated. The research shows that the five abnormal areas detected by radio tunnel perspective method coincide with the proved faults and syncline structures in the roadway excavation of the working face. Both audio frequency electrical transmission method and transient electromagnetic method have detected the abnormal water-rich area of the floor in working face. Combined with borehole exploration, the specific hydrological characteristics of the abnormal area are analyzed. The detection results provide effective geological data support for coal winning in working face and a new idea for hydrologic detection of relevant working face.