The Longriba fault zone is located in the easternmost of the Tibetan Plateau, extending NE-SW. It is parallel to the Longmen Shan fault zone that is about 150 km away from the Longriba fault zone to the east. Unlike the Longmen Shan fault zone, the Longriba fault zone shows as a sharp GPS gradient, indicating the Longriba fault zone would contain important tectonic features. However, how the Longriba fault zone extends at the surface has not yet been fully addressed and controversies remained, which has retarded our understanding on the tectonic response of the eastern Tibetan Plateau to the ongoing India-Eurasia collision. In this paper, integrated with surface geology and previous studies of geophysical data, we firstly employed ALOS-PALSAR satellite data to document the surface tectonic response, and therefore, to control the surface extent of the Longriba fault zone. Results show that the Longriba fault zone terminates to the west before approaching the Xianshuihe fault zone and shows perpendicular to the Fubianhe fualt zone. Results of this paper would provide important data support for us to better understand the tectonic feature of the Longriba fault zone.