Interferometric synthetic aperture radar (InSAR) has become one of the key technologies to obtain high-precision Digital Orthophoto Map (DOM) and Digital Surface Model (DSM).It is not affected by weather conditions and can acquire data in all day and weather conditions.Airborne dual-antenna millimeter-wave InSAR is independent of loss-of-correlation which has the characteristics of small size,high resolution,high flexibility,etc.And it can obtain large-scale and high-precision images.This paper uses airborne dual-antenna millimeter-wave InSAR to acquire high-precision DOM and DSM in Shibing experimental area of Guizhou (mountainous) and Qionglai experimental area of Sichuan (alpine) through interference processing,block adjustment,geocoding,and image mosaic.Besides,the ground control points (GCPs) are used to verify the accuracy.The results show that the accuracy of DSM obtained meets the requirement of 1:5000 terrain mapping.It has been proven that the airborne dual-antenna millimeter-wave InSAR has the ability to generate DOM/DSM with different terrains,which provides a new technical means for solving the lack of DOM/DSM data in tough areas.