Abstract: In the modern radar electronic warfare, the threat of radar active deception jamming is more serious to radar system. When an array radar is under the jamming, it can’t to detect and track the real target. To solve this problem, a suppression method in spatial and polarization domains is presented in this paper. Firstly, the parameters of target and jamming such as direction of arrival (DOA) and polarization parameter are measured by matrix method. Then, the filter operator is constructed in the two domains based on the space projection. At last, with the help of the filter operator, the jamming is eliminated while the target echo is extracted. The performance of algorithm is appraised by the improvement factor of signal to jamming and noise ratio, and the upper limit of this ratio is reduced. Moreover, the algorithm has low computation. The simulations show that the algorithm can not only suppress deception jamming effectively but also noise to an extent. In the case of SNR>10dB, the relative error of parameter estimation is less than 0.1, the correlation coefficient of the target echoes is over 90%, and the suppression degree of jamming and noise is larger than 10dB. Thanks to the high precision measurement, the algorithm has a good performance.