Abstract: Through the mine transient electromagnetic method （MTEM） detection technology, the spatial distribution of water in 1311 working face in Yangcheng Coal Mine is carried out. Five measuring zones are arranged in the process. Track lane of 1311 working face, obliquely upward 60° direction, horizontal direction, obliquely downward 45° direction outside the track-crossheading connection tunnel and the water outlet points of track-crossheading tunnel in 1311 working face are chosen to carry out the detection. The self-developed “mine TEM data processing and interpretation system” is used to deal with the data, and the range of the low resistivity anomaly reaction area in the external slope of working face is obtained, which ensures the safe mining of the area.