Abstract: In view of problems of large randomness, low efficiency of coal caving of artificial operation for top coal caving mining face, an automatic control system of top coal caving on fully-mechanized coal mining face was designed. The system uses coal gangue recognition sensor to collect, analyze, process vibration signals generated by coal and gangue impacts tail beam, so as to determine the whereabouts condition of coal and gangue, and the processing results were sent to support controller by ZigBee wireless transceiver, then the support controller automatically control coal caving support action according to test results to achieve automatic control of process of coal caving.