Aiming at the difficulty of synthetic aperture radar (SAR) images processing and interpretating in topography, forest vegetation identification, this paper employs the work and progress made by the research group in recent years. Using multi-angle, multi-band, multi-polarization, polarimetric interferometric, and other multi-mode aviation, aerospace SAR data, the terrain features library based on the scattering mechanism are established, and the terrain radiation correction, polarization interfe-rence processing, stereoscopic measurement and knowledge based interpretation model is constructed. The high resolution airborne polarization interference SAR data acquisition system and the SAR image high performance interpretation software system are developed. The principle, technology and method of high confidence processing and interpretation of SAR images with high precision, strong reliability and rich recognition type are realized. At the same time, this paper introduces the application of research results in the surveying and mapping, forestry and other industries, and discusses the problems and solutions in the research.