Research on performance test method of GNSS anti-jamming receiver is very important to improve the safety and reliability of satellite navigation system under actual application environment. This paper presents an improved test method of GNSS anti-jamming receiver by expanding the viewing angle range of analog signal based on microwave chamber, the method realizes multiple output of satellite signal and dynamic simulation of interference signal. Compared with the traditional test method, which are signal output of satellite signal and static simulation of interference signal, the method proposed in the paper can approximate the external reality test environment, which improves the accuracy of anti-jamming receiver performance test. Finally, through the digital simulations, the influence on anti-jamming receiver test brought by the angle of interference source and signal source and simulation error of signals is also analyzed.