Abstract: In view of requirements of network expansibility, compatibility and communication rate of mine communication system for coal mine informatization, features of WiFi communication technology were introduced, typical applications of WiFi communication technology in coal mine informatization were analyzed from aspects of extension of wired communication network, wireless dispatching communication, emergency communication, data collection and control command transmission. A view was pointed out that WiFi communication technology should be integrated with 4G communication technology, mine Internet of things communication technology and so on, so as to promote further development of coal mine informatization.