The invention discloses a real-time automatic monitor for mine acoustic emission, and belongs to the technical field of coal rock mass acoustic emission monitoring. The real-time automatic monitor comprises a real-time embedded controller, an FPGA module, a data storage module, an acquisition module, a signal synchronization module, a communicating module, an analog-to-digital conversion module, an isolation transformation module, and an LCD, wherein the real-time embedded controller is connected with the LCD and the FPGA module respectively; the FPGA module is connected with the signal synchronization module, the communicating module, the analog-to-digital conversion module, the data storage module and the acquisition module respectively; the isolation transformation module is connected with the analog-to-digital conversion module. The real-time automatic monitor is low in power consumption, can perform continuous all-weather acquisition and monitoring for characteristic parameters including acoustic emission incident number, ringing count, energy and the like for the coal rock mass and a concrete structure, and can realize synchronous and parallel signal communication, signal storage, signal treatment and analysis, acoustic alarming, information feedback and working condition display through allocating IP address and performing working instructions, and can either be hung to a mine safety monitoring system or work independently.