This paper introduces and designs a system that it is able to achieve coal and rock automatic identification of fully mechanized mining. The system uses TLC320AD50C and TMS320VC5402DSP for processing sonic signals gathered. On that basis, FastICA algorithm of Independent Component Analysis (ICA) is applied in coal and rock interface identification. At last, the design of the soft and hardware also is completed. The system has the high real-time and algorithm processing ability, which is able to achieve coal and rock identification accurately.