Abstract: The ZPW-2000A type non-insulated track circuit made in China solves the shortcomings of checking the broken track in the tuning area, and reduces the shortcomings of the dead zone in the tuning area. It is widely used in contemporary railway transportation. Using field programmable gate array (FPGA) to design digital circuits with high flexibility and strong logic functions, this paper introduces the Chinese-made ZPW-2000A frequency-shift signal generation mechanism, and explains the design flow of direct digital frequency synthesis direct digital frequency synthesis (DDS) function signal generators and the principle of generating waveforms. The DDS module is designed based on FPGA to realize the function of Chinese-made ZPW-2000A frequency shift signal generator. The design results prove that the Chinese-made ZPW-2000A frequency-shift signal generator based on FPGA design has the characteristics of stable system performance, adjustable frequency, high reliability, and continuous phase, which can provide theoretical and practical applications for railway transportation.