With the rapid development of digital image processing technology and microelectronic integrated circuits, real-time dynamic biomedical imaging becomes possible. The key to biomedical dynamic imaging is high communication bandwidth and fast data processing capabilities. FPGA(field-programmable gate array) brings new methods and ideas for real-time digital image processing system in algorithm and system structure. This paper first briefly introduces the concept, characteristics and development process of FPGA, and compares FPGA and general-purpose processor in performance indicators, then focuses on the principles of conventional biomedical imaging technology and FPGA research and application of high-speed imaging technology in the biomedical imaging field, and finally summarized and prospected FPGA in real-time imaging.