Abstract: The paper introduced principle of electrical explosion proof and expounded developing situation of intrinsically safe explosion proof mode form the views of theoretical research and product development at home and abroad.It emphatically discussed problems existed in power supply system for mine safety monitoring at home at present,namely adaptability of the system's input,intelligence of the system,optimum design of standby power supply,anti-interference ability of the system,and intrinsically safe power supply with high capacity.It introduced a novel power supply system for mine safety monitoring,which has good anti-interference performance and functions of intelligent monitoring of the system's running parameters,early warning,and fault diagnosis.