Abstract: This paper studies the LoRa technology and its related characteristics and advantages, and analyzes the application form and methods of LoRa technology for coal mine. As a low power remote communication technology for Internet of things, LoRa technology uses a number of technologies such as spread spectrum modulation. It takes into account the problems of low power and long distance communication. It has the characteristics of long distance networking, low power consumption, low cost, low rate and large scale. It can organize network through Transparent transmission, Private protocol and LoRaWAN protocol to realize remote networking communication. In the coal mine, a large number of wireless networks have been used to realize such applications as monitoring, positioning and communication, but various technologies (such as ZigBee network) have much problems, especially for remote and low-speed networking, LoRa technology is a very ideal solution at present.