At present, problems of small communication range and more blind zone are existent in an extensively used radio station intercom system, for the above-mentioned problem, the invention provides a multi-card Beidou transmitting/receiving radio station repeater. The device performs the voice transmission by using the Beidou multi-card switching, and the transmitted voice is converted into an ultra-short wave radio station signal to transmit and receive, and then the service range of the intercom and the radio station are extended. The device comprises a Beidou multi-card transmitting/receiving control module, a master control unit, and an ultra-short wave receiving/transmitting unit. The Beidou multi-card transmitting/receiving module improves the transmission frequency and bandwidth of the voice signal and improves the instantaneity of the voice intercom through the multi-user card switching transmission control; the master control unit performs low-code stream compression on the voice signal, and then performs the delay audio mixing processing to improve the differentiation degree of the narrow-band voice under the normal speed; and meanwhile, the invention further designs a radio station adaption circuit to finish the conversion between the Beidou voice signal and the radio station signal, the conversion comprises the PTT, COR and delay compensation.