Abstract: A novel forward-looking SAR three-dimension imaging method based on interferometric technology through different snapshots is proposed in this paper. Practical linear array antennas are laid to achieve high azimuth resolution in azimuth dimension and each high resolution snapshot in two dimensions is achieved corresponding to only one transmitted pulse. The interferometric phase information is extracted from snapshots with different squint angles for height estimation through multi-baseline interferometric technology. The main characteristics of the proposed three-dimension imaging method lie in both short data acquisition time, low data amount and computational load. Meanwhile, signal-to-noise ratio is improved through multi-baseline InSAR combined pixels method to ensure high height precision. Numeric simulation results confirm the validation of the proposal.