Abstract: Tailing reservoir is a potential safety hazard point. In order to improve the safety stability of tailing reservoir, the application situation of tailing reservoir online safety monitoring system were intro⁃ duced based on features design and function analysis of tailing reservoir online safety monitoring system. It is pointed out that it is very necessary to build an online safety monitoring system in tailings reservoir, which can reduce the accident probability of tailings reservoir to a certain extent and improve mine produc⁃ tion safety. With the increasing awareness of the importance of online safety monitoring system, online safe⁃ ty monitoring system will become more perfect.

Key words: tailings reservoir, online security monitoring system, data acquisition, safety warning