According to the space distribution of ophiolite suit, melange blueschist and deep-great fault zone in the Tibetan plateau, five suture zones of different periods are divided. They extend in belts and with Nww trends, which turn to SN direction at their east end. The geological age of these suture zones of plate is from the early palaeozoic the cenozoic era. Except the Yarlung zangbo jiang belt, the rest are the suture zones of paleoplate, which still had activities in the quaternary period.
Based the distribution characteristics and migration regularity of strong earthquakes (M_s≥6) studied region, the author of this paper suggests that those seismic belts coincide with both the distribution of young suture zone of plate and that of active suture zone of paleoplate. The generation of the earthquake is related to the collision of the Indian and the Eurasian plates. It is also related to the activities of mantle material, but the sutures of plate only function to control the earthquakes.