Abstract: In this paper, the design and implementation of a universal broadband ADCP (Acoustic Doppler Current Profilers) signal processing system with functions of high frequency acquisition, digital demodulation and filtering is introduced. By taking FPGA (Field Programmable Gate Array)+DSP (Digital Signal Processor)+MSP430 (Mixed Signal Processor 430) as the architecture platform, the system utilizes the different advantages of these three chips in signal processing and adopts the way of hardware and software co-design to meet the application requirements of high frequency ADCP, such as high sampling rate, high data processing ability and low power consumption. The system realizes strict orthogonal phases on the basis of ensuring data processing speed, and realizes the multi-band and multi-functional usability design through parametric configuration, which can be applied to the vessel-mounted and the self-contained ADCP in different frequency bands. Experiments on the Lake show that the system has high accuracy, stable and reliable performance, and achieves the expected design targets. The hardware and software partitioning method of the system has a certain reference value for the development of other high frequency marine equipment.