Abstract: The paper introduced composition and functions of model KJ69N mine-used monitoring system for personnel safety and its application in Xinchazhuang Mining Co., Ltd.. The system can timely and accurately report dynamic position of personnel distributed in underground site to ground computer system and make managers grasp information of leaders going into mine, underground personnel distribution and time of going into underground and back from underground and moving trajectory of each personnel, which is helpful for underground over-staff management, attendance management and accident emergency rescue.