Abstract: After cancellation processing of echoed data from two channels of SAR, a novel method based on compressed sensing is proposed, which implements two dimensional compressing and reconstructing for moving target spectrogram in SAR imaging. The two dimensional measurement matrixes are established to compress spectrogram data both in range and slow time. Then the two dimensional orthogonal matching pursuit (OMP) algorithm is designed in receiving port, which can reconstruct original spectrogram information to acquire the high resolution image of moving target. Firstly, the spectrogram data of SAR imaging for moving target can be reduced apparently by using the method; secondly, the primitive spectrogram information can be exactly reconstructed on the condition that the estimated sparsity degree is no less than and close to the supposed one, the high quality image of moving target can be achieved meanwhile. The effectiveness of the method is validated by the simulation results.