Abstract: The paper indicated that sensor mine Internet of things is extension and extended application based on integrated automation of coal mine, it is different from integrated automation system in a great degree; it is also different from application of surface Internet of things due to the characteristics of coal mine application. The paper introduced characteristics of sensor mine Internet of things which mainly show in several aspects of integrated application of multiple systems, opening of sensor layer and application platform and being suitable for constructing logic subsystems. It analyzed key technologies of sensor layer, network layer and application layer and common technology with cross-layer, and gave openness requirements and standard construction of sensor mine Internet of things. The paper has certain reference value for better understanding construction of sensor mine Internet of things.