Abstract: The current status of mine network was summarized. According to development goal of mine Internet of things and changing trend of information processing modes in future mine, developing requirements and trend of mine network were analyzed form aspects of network capacity, manageability, dense access, real-time performance, intelligentization, emergency communication after disaster, etc. Design principles of network of mine Internet of things were proposed including flattening, intelligentization, resource abstraction, etc. The application and developing requirements of key technologies in mine Internet of things were introduced such as wireless transmission coding, software-defined network, flow offloading, edge computation, network function virtualization, cognitive radio, energy capture, semantic network and so on.