Abstract: In order to ensure the safe and high-efficiency operation of coal preparation plants, a real-time safety monitoring system for closed belt conveyance way is proposed in line with the characteristics of such ways of coal preparation plants.The work made in the paper involves mainly the study of the methods for the monitoring of the operation of belt conveyor, detection and monitoring of concentration of coal dust and smoke and the atomising spray technique for elimination of safety hazards.Based on result of study the system architecture is designed and the schemes for dealing with emergency cases in different scenarios are worked out.As the information of the overall coal conveyance way is completely under real-time monitoring, the safety factor of the belt conveyance way is significantly improved.Practice shows that the use of the system can lead to not only higher safety in belt conveyance, but also effective rise of labor productivity and improvement of economic performance of coal preparation plant.