Abstract: Deceptive interference has strong directionality in space. Their decomposition (projection) can be realized effectively in the Doppler domain by utilizing the angle-doppler relation of SAR signals. Taking advantage of this, a joint spatial-temporal adaptive filter based on multiple Doppler constraints is proposed in this paper, which can realize effective suppression of deceptive interference signals in combination with multi-channel SAR system. The space-time spectrum of the effective signal and DFI is firstly analyzed and estimated. Then the squint MSAR data are processed. The main lobe DFI is removed by using the subspace projection matrix and the suppression of the side lobe DFI and the reconstruction of the signal spectrum are realized by using the multidoppler direction linearly-constrained minimum variance (MDD-LCMV) beamformer. In this paper, the effectiveness of the proposed algorithm is verified by point simulation experiments.