The invention relates to an FM broadcast sub-carrier signal receiving and decoding module, including FM receiving demodulation and sub-carrier signal separation demodulation, communication information data processing, communication with the terminal, controlling CPU and data memory. Signal transmission is like this: after receiving the transmitted information, using FM receiving demodulation to process FM broadcast, transferring FM high frequency signal, filtering out stereo-sonic signals and sub-carrier signals from the I.F section and sending them to sub-carrier signal separation and demodulation module for decoding, resolving interference according to DARC protocol, sending data to CPU for communication information data processing and passing them through serial ports to various terminals for application; receiving decoding software includes the processes of receiving decoding procedure, accessing and processing data, inserting data, deleting data and storing data in CPU. The module has a simple structure and is easy to process. As the interface protocol is open in nature, the price is only 10% of that of its kind when used together with the communication database.