Abstract: The power supply system for electric locomotive was always at the supply mode generally no matter whether the locomotives were at work or not in underground mines, which caused not only a large amount of power loss and leakage but also serious hidden danger to workers' personnel safety.A kind of intelligent control system for mine secure power saving has been therefore designed, which can automatically cut off the power supply when all electrical locomotives of a line are stopped and automatically resume the power supply when a locomotive starts.The practical testing indicates that the system has an evident electricity-saving effect while ensuring a safe underground operation.

Key words: Electric locomotive, Electricity saving, Intelligence, Safe operation