Simulation analysis about the anti-interference of Polarization Sensitive Array is carried out on the polar domain and space domain, by establishing the model of Polarization Sensitive element. The simulation results show that the method of anti-interference using Polarization Sensitive Array can expand the freedom of anti-interference processing. At the same time, the method can realize anti-interference in polarization domain by the difference between useful signal and interference signal in polarization domain when the useful signal and the interfering signal are in the same direction.