Abstract: Based on spatial distribution and characteristics of seismic migration after the earthquakes in the northwest region of the the Tibet plateau, we discussed the main active tectonic struct ures and seismic activity, which related to seismic migration. By analyzing the relationship between active tectonics and seismic activity, the following conclusion- sareobtained: (1) Migration earthquakes are unevenly distributed in the border of active blocks, controlled by the large active tectonic zones; (2) There are three migration paths, dominated by the second path; (3) Within the next five years in the west area of the Altun fault zone, there will be one or two earthquakes of magnitude 6.5; (4) Earthquakes happened after 1900 are mainly distributed along the empty areas; (5) Within the next three to six months, strong migra tion earthquakes may occur in seismic empty areas, such as the south section of Longmenshan.

Key words: Seismic migration, Active tectonics, The Tibet plateau, The Yutian region