The invention discloses a radar signal simulation system for generating signals through data files and belongs to the field of communication. The system comprises a computer unit, a USB (Universal Serial Bus) to high-speed serial port circuit, an FPGA (Field Programmable Gate Array) unit, a DA (Digital-Analog) circuit and a microwave circuit, wherein the computer unit is used for transmitting a PDW (Parallel Data Warehouse) pulse description word file to the FPGA unit; the PFGA unit is used for analyzing PDW pulse description words in real time to control the DA circuit and a microwave controlchain to generate simulation radar signals. By adopting the system, radar signal simulation functions are achieved, various system radar signals and anti-interference radar signals, including commonpulse, common continuous waves, repeated frequency jittering, repeated frequency diversity, pulse Doppler, pulse groups, frequency agility, frequency diversity, linear frequency modulation, waveform modulation, phase encoding and the like, can be simulated through man-machine interaction by using a radar signal simulator, and the system can be applied to radar equipment testing.