Abstract: In order to meet the requirements of "Coal Mine Safety Regulations",including the DC power supply cannot be lower than 2 hours, extending the battery service life of the monitoring control substation and personnel positioning substation, solving the artificial underground site operation which affects safety production to increase efficiency. The embedded cold discharge device is developed for backup power coal mine safety monitoring and controlling, personnel positioning system that can be embedded in the switch, the remote command can be sent to the underground substation through the monitoring host in the control room. Once getting the command, the backup battery of underground substation can achieve self-discharge or stopping discharge.