SAR Interferometry (InSAR) is a new research branch in SAR remote sensing technology. In the past, InSAR application was mainly focused on acquiring DEM by means of extracting phase information preserved in RADAR backscatter. With the development of InSAR technology, importance has been increasingly attached to interferometric coherence, and its application has been extended to many fields. This paper presents a SAR image color composition model based on SAR interferometric coherence. With this model, different kinds of objects can be distinguished clearly by different colors in image, and it is proved that this technique is especially suitable for forest monitoring and land use application.