Abstract:This article proposed a new mode of online safety monitoring system of tailings dam based on the Internet of things, which can solve the problem of the current mode, such as high investment, high cost of maintenance shortcomings, redundant construction, low utilization rate of resources. It has abandoned the traditional "sensor data acquisition station server" construction mode, combined with the cloud service technology, put forward the "Internet of things sensor cloud service terminal" construction concept, and its feasibility is verified by an example.