The utility model provides a digital channel machine with a CSBK transmission function, which comprises a user interface unit, a signaling control unit, a baseband modulation and demodulation unit, anFFSK modulation and demodulation unit and a radio frequency transceiving unit, and is characterized in that the user interface unit is in electric connection and communication connection with the signaling control unit; wherein the signaling control unit is electrically and communicatively connected with the baseband modulation-demodulation unit and the FFSK modulation-demodulation unit, the FFSKmodulation-demodulation unit is electrically and communicatively connected with the baseband modulation-demodulation unit, and the baseband modulation-demodulation unit is electrically and communicatively connected with the radio frequency transceiving unit. According to the utility model, the mode of the signaling control circuit and the baseband modulation and demodulation circuit is adopted, the modulation and demodulation functions of CSBK data and 4FSK signals are realized, and the digital transmission of train tail data is realized; based on the FFSK modulation and demodulation technology, analog communication of train tail data is achieved, and smooth transition of train tail data communication from analog to digital is achieved.