极化干涉SAR是目前雷达遥感的前沿领域，它是集极化SAR和干涉SAR于一体的新型对地观测技术。通过对极化干涉的基本原理和物理机制，极化干涉SAR的数据处理及与常规干涉SAR数据处理的区别，以及极化干涉SAR当前的几个热点应用研究领域进行了阐述，对极化干涉SAR存在的问题也进行了讨论。

Polarimetric SAR Interferometry (Pol-InSAR) represents the current culmination in microwave remote sensing technology, it is a new earth observation technology that integrated the Polarimetric SAR and Interferomteric SAR. In this paper, the basic principal and physical mechanism of Pol-InSAR, data processing and the difference between conventional InSAR and Pol-InSAR, and several hot application scopes are discussed in detail. At last, the existing problems and prospective of Pol-InSAR are also discussed.