Analyzing the data of the focal mechanism solutions, the tectonic stress field, the geodetic deformation ob- servation and the 3D P-wave crust velocity structure in the area of southeastern of Yong'an-Jinjiang Fault, the followings results were obtained: ( 1 ) The earthquake dynamic in Fujian coast mainly comes from South-East Sea of Fujian region, and the earthquake dynamic effect is closely related to the effect of Philippines plate on Taiwan arc. (2) The direction of principal compressive stress axis in tectonic stress field is consistent with that of Yong'an-Jinjiang Fault zone in NW-direction. The wave front of earthquake dynamic is located at Quanzhou Bay region, and the direction of earthquake dynamic effect spread out from Quanzhou Bay to its northwestern ar- ea as a fan-shape. (3) The main movement of southeastern segment of Yongan-Jinjiang Fault zone is extension- al strike-slip, so it is regard as the area of easily occurrence of the normal or strike-slip type earthquakes in the fault zone.