An acoustic signal transmission system is designed which is controlled by CPLD XC2C128.The waveform is stored by EPROM M27C64A,and the signal can be transmitted through the D/A converter(AD5330),power amplifier(MAX9703)and transformer.In addition,TDM,FDM and CDM can also be used in this system by changing the coding method or the type and capacity of the memory.The system has been verified the feasibility and expansibility by means of many experi-ments.