Aiming at the problem that the existing underground broadcasting system is not integrated enough and expandable enough to interact with other intelligent equipment,designs a mine loudspeaker box with the function of integration and linkage with other underground systems,and builds the mine broadcasting system on this basis.The loudspeaker box adopts BCM1190 microcomputer as the main controller,realizing the high integration of group call,full call,free line division,partition broadcasting,directional intercom and other functions.The high-speed optical MOS tube is used to realize the absolute isolation of the front and rear levels,and the relay control actuator switch is installed to improve the anti-interference ability of the control loop and prevent the misleading clearance break action of high magnetic field interference.It supports 10/100M adaptive synchronous full-duplex Ethernet communication to realize interconnection and interworking with other systems,realizes data delivery through CAN bus,and has strong error detection ability.It has strong real-time performance,long transmission distance and strong anti-electromagnetic interference in high-noise interference environment.Relying on the underground communication network such as 5G,4G and WiFi,the above mining broadcasting interactive system can achieve fixed-point broadcasting,two-way intercom,audio and video linkage,electronic fence and other functions in the whole mine,effectively improving the ability to ensure the safety of coal mine production.