Abstract: The paper introduced general framework of comprehensive intelligent pre-warning system of coal mine safety based on Internet of Things, expounded design of each pre-warning model namely gas pre-warning model, fire pre-warning model, flood pre-warning model and roof pre-warning model, and gave business process of intelligent decision. The system can make real-time monitoring and intelligent pre-warning for hidden danger in process of coal mine safety production, so as to improve safety production level of coal enterprises.