In view of the continuous improvement of maritime safety requirements, the demand for maritime radar signal processing system is increasing day by day. A ship radar Signal processing system based on Field-Programmable Gate Array (FPGA) and Digital Signal Processor (DSP) is designed in this paper. The system design covers the construction of hardware architecture and the realization of signal processing algorithm. Through the advantages of FPGA in parallel processing and logic realization, and the powerful ability of DSP in high-speed mathematical operation and signal processing algorithm, the high-speed data interaction of ship and ship system is realized. The stability of the system is verified by simulation and measured data. The results show that the system can effectively process the radar echo signal, realize the rapid and accurate detection of Marine targets, and perform well in clutter suppression. The design of this paper not only meets the needs of modern ship radar signal processing, but also provides a new idea and technical reference for the research of related fields.