Abstract: In view of special requirements of dispatching functions of voice communication in coal mine underground, the paper analyzed soft switch technique for VoIP communication, proposed an implementing method of mine-used dispatching and communication service in soft switch platform, and introduced a design scheme of mine-used service system of dispatching and communication based on soft switch platform by use of FreeSWITCH. The system provides dispatching and communication services such as calling, monitoring, interjecting, contesting calling, forcedly demolishing calling, group calling, listening only, listening and speaking, adding/deleting provisional members, setting/canceling chairman, recording and so on with high expansibility, and can select hardwares of server according to number of users underground. The testing result verified validity of the system, which provides a practical scheme for dispatching and communication service platform in coal mine underground.