Abstract: From the angle of safe distance control of hazards, the paper studied the mechanism, indicators, grade and rules of coal and gas outburst early-warning, and then an early-warning method based on mining progress monitoring is formed. At the same time, the GJJ100 laser range sensor and early-warning software were developed. Finally, taking coal mine safety monitoring system, underground ethernet ring network and ground office network as the support, the coal and gas outburst early-warning system based on mining progress monitoring is built, which implements spatial distance on-line monitoring and real time early-warning between workface and coal and gas outburst easy-happening area.