Abstract: The analysis of focal mechanism for 70 events in the SE coastal China indicates that the principal compression axes of the recent stress field is characterized by a fan-shaped distribution. The nature of focal dislocation of the east portion of the coastal region is quite different from that of the West.Based on the stress field data of Southeast Asia from earthquake focal mechanism analysis, it seems clear that the stress field, as well as its character, may reasonably be explained by the movement of the Pacific and the Indian Ocean plates relative to the Eurasian Plate.