Based on the general analyzing the characteristics of distribution and development of the terraces along Zhuanglang river,in Lanzhou,the longitudinal and latitudinal profiles of Ⅰ-Ⅲ terraces are given by virtual of high-resolution differential GPS carried through detail surveying.According to the dating result of different terraces,their tectonic deformation characters are studied and the quantificational parameters of terrace deformation in fault area such as deformation characters,breadth of deformation zone,extent of deformation and velocity etc are gotten.The result indicates that fault-propagation fold plays most important role in the tectonic deformation of the terraces.The terrace deformation rates have been accelerated since the late Quaternary.