Abstract: Aiming at the roof water disaster problems during the mine construction and mine production at No.5 coal seam of Hongliulin Coal Mine. The mine transient electromagnetic method is used to explore the mine water abundance and concealed water-bearing structure at 25203 roof bedrock, and distribution situation of face roof water-rich region is found out. The results show that the mine transient electromagnetic method is relatively suitable for detecting the mine spatial position and watery degree in aquifer rich water area of working face roof, and this technology provides effective scientific basis for controlling roof water of working face.