Underground drilling nuclear magnetic resonance detection device and working method

The invention belongs to the field of rock-soil detection, and provides an underground drilling nuclear magnetic resonance detection device and a working method. The device comprises a transmitting system, a transmitting coil, a receiving system, a receiving probe, a control system and a processor, the control system is respectively connected with the transmitting system and the receiving system; the transmitting system is connected with a transmitting coil, and the transmitting coil is arranged on a tunnel face and used for transmitting pulse signals with set frequency and amplitude; the receiving system is connected with a receiving probe, and the receiving probe is arranged in a drill hole of a tunnel face and used for collecting echo signals of the pulse signals and transmitting the echo signals to the processor through the receiving system; and the processor is used for obtaining detection result data according to the echo signal, analyzing and imaging, and identifying the underground water source. 本发明属于