The authors extracted geological differences between the two blocks aside of the Yarlung Zangbo River, and some information about tectonic evolution of Yarlung Zangbo suture zone, which based on interpretation of remote sensing and statistical analysis. According to the research, the authors discussed the tectonic evolution of Yarlung Zanbo suture zone, which it can be divided into four stages. The first, the two blocks had each different evolution in geological history before they were matched. The second, the blocks were matched by orogenic movement of collision, which the dynamic direction was from south to north and formed some conjugate joints in NE and NW directions. The third, the monolithic region was ulteriorly forced, but the dynamic direction had a bit of change. At last, the tectonic movement became elevator tectonics in this region, which controlled modern model of river to be developed in E-W direction and topography.