Abstract: A signal system design based on non-stationary interference signals is proposed for GNSS anti-interference antenna arrays to improve the interference effect on GNSS signals. Simulate non-stationary interference signals from different systems by constructing interference scenarios targeting GNSS anti-interference antenna arrays. For anti-interference antennas using space frequency anti-interference algorithms, the interference effect of GNSS signals is improved by more than 10 dB compared to traditional broadband spread spectrum interference by using non-stationary interference signals. The designed interference system, with its non-stationary characteristics, breaks the premise of designing antenna array anti-interference algorithms (the interference signal is generally stable), and has a significant impact on the performance of such anti-interference algorithms.