According To The Characteristics Of Coal Mine Environment, In This Paper We Propose A Multi-parameter Wireless Sensor Network Monitoring System Based On Zigbee Technology For Coal Mine Tunnel. The System Can Real-time Monitor The Underground Environment And Production Parameters And Intelligently Give Early Warning By Using A Variety Of Sensors And Wireless Sensor Network. It Is Flexible To Add Sensors And Enhance Stability Of Monitoring Computer Software Through RS-485 Communication Protocol And Hardware Modular. Experiments Have Proved Feasibility And Good Stability Of The System.