Abstract. In order to meet the data transmission of security and real time requirement in trading system, in this paper, a design scheme of 16 level pipeline encryption system based on FPGA is proposed. Using the 7K325T model of the Xilinx company`s FPGA chip to achieve circuit design. The results show that the circuit can work stably, the maximum frequency of the encryption module is up to 166MHz, and the encryption speed is 10.62Gb/s, which can ensure the security and efficiency of the data.